64689744 has 40 divisors (see below), whose sum is σ = 190989760. Its totient is φ = 18482688.

The previous prime is 64689701. The next prime is 64689761. The reversal of 64689744 is 44798646.

64689744 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 64689693 and 64689702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95929 + ... + 96600.

It is an arithmetic number, because the mean of its divisors is an integer number (4774744).

Almost surely, 2^64689744 is an apocalyptic number.

It is an amenable number.

64689744 is an abundant number, since it is smaller than the sum of its proper divisors (126300016).

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

64689744 is a wasteful number, since it uses less digits than its factorization.

64689744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192547 (or 192541 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 48.

The square root of 64689744 is about 8042.9934725822. The cubic root of 64689744 is about 401.4318351712.

The spelling of 64689744 in words is "sixty-four million, six hundred eighty-nine thousand, seven hundred forty-four".