1990656000 has 408 divisors, whose sum is σ = 7442735664. Its totient is φ = 530841600.

The previous prime is 1990655993. The next prime is 1990656007. The reversal of 1990656000 is 6560991.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a Jordan-Polya number, since it can be written as (6!)² ⋅ 5! ⋅ (2!)⁵.

1990656000 is a `hidden beast` number, since 1 + 9 + 90 + 6 + 560 + 0 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1990655993) and next prime (1990656007).

It is a super-2 number, since 2×1990656000² = 7925422620672000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990656007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 398131198 + ... + 398131202.

Almost surely, 2^1990656000 is an apocalyptic number.

1990656000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1990656000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3721367832).

1990656000 is an abundant number, since it is smaller than the sum of its proper divisors (5452079664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1990656000 is an frugal number, since it uses more digits than its factorization.

1990656000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62 (or 10 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 1990656000 is about 44616.7681483094. The cubic root of 1990656000 is about 1257.9558692203.

The spelling of 1990656000 in words is "one billion, nine hundred ninety million, six hundred fifty-six thousand".