64220464 has 40 divisors (see below), whose sum is σ = 155132928. Its totient is φ = 25020480.

The previous prime is 64220461. The next prime is 64220467. The reversal of 64220464 is 46402246.

It is an interprime number because it is at equal distance from previous prime (64220461) and next prime (64220467).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (64220461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24832 + ... + 27295.

Almost surely, 2^64220464 is an apocalyptic number.

It is an amenable number.

64220464 is an abundant number, since it is smaller than the sum of its proper divisors (90912464).

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

64220464 is a wasteful number, since it uses less digits than its factorization.

64220464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52153 (or 52147 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 64220464 is about 8013.7671540918. The cubic root of 64220464 is about 400.4587736158.

The spelling of 64220464 in words is "sixty-four million, two hundred twenty thousand, four hundred sixty-four".