64464420 has 48 divisors (see below), whose sum is σ = 180972288. Its totient is φ = 17145600.

The previous prime is 64464409. The next prime is 64464431. The reversal of 64464420 is 2446446.

It is an interprime number because it is at equal distance from previous prime (64464409) and next prime (64464431).

It is a super-2 number, since 2×64464420² = 8311322891872800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 26245 + ... + 28595.

It is an arithmetic number, because the mean of its divisors is an integer number (3770256).

Almost surely, 2^64464420 is an apocalyptic number.

64464420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64464420 is an abundant number, since it is smaller than the sum of its proper divisors (116507868).

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

64464420 is a wasteful number, since it uses less digits than its factorization.

64464420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2820 (or 2818 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

The square root of 64464420 is about 8028.9737824955. The cubic root of 64464420 is about 400.9652107140.

The spelling of 64464420 in words is "sixty-four million, four hundred sixty-four thousand, four hundred twenty".