64930320 has 240 divisors, whose sum is σ = 268649472. Its totient is φ = 13685760.

The previous prime is 64930309. The next prime is 64930351. The reversal of 64930320 is 2303946.

It is a tau number, because it is divible by the number of its divisors (240).

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, 65025 + ... + 66015.

Almost surely, 2^64930320 is an apocalyptic number.

64930320 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 64930320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134324736).

64930320 is an abundant number, since it is smaller than the sum of its proper divisors (203719152).

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

64930320 is a wasteful number, since it uses less digits than its factorization.

64930320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030 (or 1021 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 64930320 is about 8057.9352193971. The cubic root of 64930320 is about 401.9288505550.

The spelling of 64930320 in words is "sixty-four million, nine hundred thirty thousand, three hundred twenty".