64389924 has 48 divisors (see below), whose sum is σ = 168618240. Its totient is φ = 21247200.

The previous prime is 64389911. The next prime is 64389959. The reversal of 64389924 is 42998346.

It is a self number, because there is not a number n which added to its sum of digits gives 64389924.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7957 + ... + 13859.

It is an arithmetic number, because the mean of its divisors is an integer number (3512880).

Almost surely, 2^64389924 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64389924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84309120).

64389924 is an abundant number, since it is smaller than the sum of its proper divisors (104228316).

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

64389924 is a wasteful number, since it uses less digits than its factorization.

64389924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6017 (or 6009 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 64389924 is about 8024.3332433293. Note that the first 3 decimals coincide. The cubic root of 64389924 is about 400.8106974806.

The spelling of 64389924 in words is "sixty-four million, three hundred eighty-nine thousand, nine hundred twenty-four".