1629890920 has 192 divisors, whose sum is σ = 4436752320. Its totient is φ = 536933376.

The previous prime is 1629890897. The next prime is 1629891001. The reversal of 1629890920 is 290989261.

It is a super-2 number, since 2×1629890920² = 5313088822196892800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6995124 + ... + 6995356.

It is an arithmetic number, because the mean of its divisors is an integer number (23108085).

Almost surely, 2^1629890920 is an apocalyptic number.

1629890920 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 1629890920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2218376160).

1629890920 is an abundant number, since it is smaller than the sum of its proper divisors (2806861400).

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

1629890920 is a wasteful number, since it uses less digits than its factorization.

1629890920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 1629890920 is about 40371.9075595890. The cubic root of 1629890920 is about 1176.8456691280.

The spelling of 1629890920 in words is "one billion, six hundred twenty-nine million, eight hundred ninety thousand, nine hundred twenty".