64669388 has 24 divisors (see below), whose sum is σ = 136147200. Its totient is φ = 26256528.

The previous prime is 64669357. The next prime is 64669393. The reversal of 64669388 is 88396646.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60248 + ... + 61311.

It is an arithmetic number, because the mean of its divisors is an integer number (5672800).

Almost surely, 2^64669388 is an apocalyptic number.

It is an amenable number.

64669388 is an abundant number, since it is smaller than the sum of its proper divisors (71477812).

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

64669388 is a wasteful number, since it uses less digits than its factorization.

64669388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121589 (or 121587 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 50.

The square root of 64669388 is about 8041.7279237736. The cubic root of 64669388 is about 401.3897244068.

The spelling of 64669388 in words is "sixty-four million, six hundred sixty-nine thousand, three hundred eighty-eight".