32497920 has 432 divisors, whose sum is σ = 142851072. Its totient is φ = 6635520.

The previous prime is 32497891. The next prime is 32497937. The reversal of 32497920 is 2979423.

It is a super-2 number, since 2×32497920² = 2112229608652800, which contains 22 as substring.

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

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, 1048305 + ... + 1048335.

Almost surely, 2^32497920 is an apocalyptic number.

32497920 is a gapful number since it is divisible by the number (30) 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 32497920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71425536).

32497920 is an abundant number, since it is smaller than the sum of its proper divisors (110353152).

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

32497920 is a wasteful number, since it uses less digits than its factorization.

32497920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 32497920 is about 5700.6946945087. The cubic root of 32497920 is about 319.1184067932.

The spelling of 32497920 in words is "thirty-two million, four hundred ninety-seven thousand, nine hundred twenty".