64119920 has 40 divisors (see below), whose sum is σ = 157851504. Its totient is φ = 24138752.

The previous prime is 64119919. The next prime is 64119943. The reversal of 64119920 is 2991146.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×64119920² = 8222728281612800, which contains 22 as substring.

It is a congruent number.

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, 22214 + ... + 24933.

Almost surely, 2^64119920 is an apocalyptic number.

It is an amenable number.

64119920 is an abundant number, since it is smaller than the sum of its proper divisors (93731584).

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

64119920 is a wasteful number, since it uses less digits than its factorization.

64119920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47177 (or 47171 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 64119920 is about 8007.4914923464. The cubic root of 64119920 is about 400.2496774538.

The spelling of 64119920 in words is "sixty-four million, one hundred nineteen thousand, nine hundred twenty".