64864724 has 24 divisors (see below), whose sum is σ = 120453480. Its totient is φ = 30457856.

The previous prime is 64864717. The next prime is 64864729. The reversal of 64864724 is 42746846.

It can be written as a sum of positive squares in 4 ways, for example, as 18215824 + 46648900 = 4268^2 + 6830^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64864729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45332 + ... + 46740.

It is an arithmetic number, because the mean of its divisors is an integer number (5018895).

Almost surely, 2^64864724 is an apocalyptic number.

It is an amenable number.

64864724 is a deficient number, since it is larger than the sum of its proper divisors (55588756).

64864724 is a wasteful number, since it uses less digits than its factorization.

64864724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2107 (or 2105 counting only the distinct ones).

The product of its digits is 258048, while the sum is 41.

The square root of 64864724 is about 8053.8639174001. The cubic root of 64864724 is about 401.7934551123.

The spelling of 64864724 in words is "sixty-four million, eight hundred sixty-four thousand, seven hundred twenty-four".