64867320 has 96 divisors (see below), whose sum is σ = 240945120. Its totient is φ = 14826240.

The previous prime is 64867307. The next prime is 64867321. The reversal of 64867320 is 2376846.

64867320 is a `hidden beast` number, since 648 + 6 + 7 + 3 + 2 + 0 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64867321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10351 + ... + 15390.

It is an arithmetic number, because the mean of its divisors is an integer number (2509845).

Almost surely, 2^64867320 is an apocalyptic number.

64867320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64867320 is an abundant number, since it is smaller than the sum of its proper divisors (176077800).

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

64867320 is a wasteful number, since it uses less digits than its factorization.

64867320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25765 (or 25758 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 64867320 is about 8054.0250806662. The cubic root of 64867320 is about 401.7988152003.

The spelling of 64867320 in words is "sixty-four million, eight hundred sixty-seven thousand, three hundred twenty".