64622389 has 24 divisors (see below), whose sum is σ = 75261312. Its totient is φ = 55261440.

The previous prime is 64622377. The next prime is 64622407. The reversal of 64622389 is 98322646.

It is not a de Polignac number, because 64622389 - 2⁵ = 64622357 is a prime.

Its product of digits (124416) is a multiple of the sum of its prime divisors (384).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64622339) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 238324 + ... + 238594.

It is an arithmetic number, because the mean of its divisors is an integer number (3135888).

Almost surely, 2^64622389 is an apocalyptic number.

It is an amenable number.

64622389 is a deficient number, since it is larger than the sum of its proper divisors (10638923).

64622389 is a wasteful number, since it uses less digits than its factorization.

64622389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397 (or 384 counting only the distinct ones).

The product of its digits is 124416, while the sum is 40.

The square root of 64622389 is about 8038.8051972914. The cubic root of 64622389 is about 401.2924630999.

The spelling of 64622389 in words is "sixty-four million, six hundred twenty-two thousand, three hundred eighty-nine".