65890920 has 32 divisors (see below), whose sum is σ = 197673120. Its totient is φ = 17570880.

The previous prime is 65890901. The next prime is 65890931. The reversal of 65890920 is 2909856.

It is a happy number.

It is a super-2 number, since 2×65890920² = 8683226676892800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274426 + ... + 274665.

It is an arithmetic number, because the mean of its divisors is an integer number (6177285).

Almost surely, 2^65890920 is an apocalyptic number.

65890920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65890920 is an abundant number, since it is smaller than the sum of its proper divisors (131782200).

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

65890920 is a wasteful number, since it uses less digits than its factorization.

65890920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549105 (or 549101 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 65890920 is about 8117.3222185644. The cubic root of 65890920 is about 403.9012437109.

The spelling of 65890920 in words is "sixty-five million, eight hundred ninety thousand, nine hundred twenty".