1990560 has 192 divisors, whose sum is σ = 7620480. Its totient is φ = 430080.

The previous prime is 1990559. The next prime is 1990577. The reversal of 1990560 is 650991.

Added to its reverse (650991) it gives a triangular number (2641551 = T₂₂₉₈).

It is a super-2 number, since 2×1990560² = 7924658227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68626 + ... + 68654.

It is an arithmetic number, because the mean of its divisors is an integer number (39690).

2^1990560 is an apocalyptic number.

1990560 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 1990560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3810240).

1990560 is an abundant number, since it is smaller than the sum of its proper divisors (5629920).

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

1990560 is a wasteful number, since it uses less digits than its factorization.

1990560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71 (or 63 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 1990560 is about 1410.8720707421. The cubic root of 1990560 is about 125.7935647125.

Adding to 1990560 its reverse (650991), we get a triangular number (2641551 = T₂₂₉₈).

The spelling of 1990560 in words is "one million, nine hundred ninety thousand, five hundred sixty".