64912320 has 224 divisors, whose sum is σ = 250179840. Its totient is φ = 15713280.

The previous prime is 64912313. The next prime is 64912339. The reversal of 64912320 is 2321946.

64912320 is a `hidden beast` number, since 649 + 12 + 3 + 2 + 0 = 666.

It is a super-3 number, since 3×64912320³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 94699 + ... + 95381.

Almost surely, 2^64912320 is an apocalyptic number.

64912320 is a gapful number since it is divisible by the number (60) 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 64912320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125089920).

64912320 is an abundant number, since it is smaller than the sum of its proper divisors (185267520).

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

64912320 is a wasteful number, since it uses less digits than its factorization.

64912320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720 (or 704 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 64912320 is about 8056.8182305424. The cubic root of 64912320 is about 401.8917061827.

The spelling of 64912320 in words is "sixty-four million, nine hundred twelve thousand, three hundred twenty".