64505724 has 24 divisors (see below), whose sum is σ = 152761728. Its totient is φ = 21180720.

The previous prime is 64505723. The next prime is 64505729. The reversal of 64505724 is 42750546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64505723) 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, 39312 + ... + 40919.

It is an arithmetic number, because the mean of its divisors is an integer number (6365072).

Almost surely, 2^64505724 is an apocalyptic number.

It is an amenable number.

64505724 is an abundant number, since it is smaller than the sum of its proper divisors (88256004).

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

64505724 is a wasteful number, since it uses less digits than its factorization.

64505724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80305 (or 80303 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 33.

The square root of 64505724 is about 8031.5455548730. The cubic root of 64505724 is about 401.0508286471.

The spelling of 64505724 in words is "sixty-four million, five hundred five thousand, seven hundred twenty-four".