64642484 has 24 divisors (see below), whose sum is σ = 121618560. Its totient is φ = 29966976.

The previous prime is 64642477. The next prime is 64642499. The reversal of 64642484 is 48424646.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

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, 5477 + ... + 12620.

It is an arithmetic number, because the mean of its divisors is an integer number (5067440).

Almost surely, 2^64642484 is an apocalyptic number.

It is an amenable number.

64642484 is a deficient number, since it is larger than the sum of its proper divisors (56976076).

64642484 is a wasteful number, since it uses less digits than its factorization.

64642484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18167 (or 18165 counting only the distinct ones).

The product of its digits is 147456, while the sum is 38.

The square root of 64642484 is about 8040.0549749364. The cubic root of 64642484 is about 401.3340541360.

The spelling of 64642484 in words is "sixty-four million, six hundred forty-two thousand, four hundred eighty-four".