64459820 has 12 divisors (see below), whose sum is σ = 135365664. Its totient is φ = 25783920.

The previous prime is 64459781. The next prime is 64459847. The reversal of 64459820 is 2895446.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1611476 + ... + 1611515.

It is an arithmetic number, because the mean of its divisors is an integer number (11280472).

Almost surely, 2^64459820 is an apocalyptic number.

It is an amenable number.

64459820 is an abundant number, since it is smaller than the sum of its proper divisors (70905844).

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

64459820 is a wasteful number, since it uses less digits than its factorization.

64459820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3223000 (or 3222998 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 64459820 is about 8028.6873148728. The cubic root of 64459820 is about 400.9556732366.

The spelling of 64459820 in words is "sixty-four million, four hundred fifty-nine thousand, eight hundred twenty".