64394456 has 16 divisors (see below), whose sum is σ = 137988240. Its totient is φ = 27597600.

The previous prime is 64394441. The next prime is 64394459. The reversal of 64394456 is 65449346.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64394459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 574895 + ... + 575006.

It is an arithmetic number, because the mean of its divisors is an integer number (8624265).

Almost surely, 2^64394456 is an apocalyptic number.

It is an amenable number.

64394456 is an abundant number, since it is smaller than the sum of its proper divisors (73593784).

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

64394456 is a wasteful number, since it uses less digits than its factorization.

64394456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149914 (or 1149910 counting only the distinct ones).

The product of its digits is 311040, while the sum is 41.

The square root of 64394456 is about 8024.6156294243. The cubic root of 64394456 is about 400.8201007710.

The spelling of 64394456 in words is "sixty-four million, three hundred ninety-four thousand, four hundred fifty-six".