64738272 has 24 divisors (see below), whose sum is σ = 169938216. Its totient is φ = 21579392.

The previous prime is 64738249. The next prime is 64738283. The reversal of 64738272 is 27283746.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 64738272.

It is a congruent number.

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, 337083 + ... + 337274.

It is an arithmetic number, because the mean of its divisors is an integer number (7080759).

Almost surely, 2^64738272 is an apocalyptic number.

It is an amenable number.

64738272 is an abundant number, since it is smaller than the sum of its proper divisors (105199944).

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

64738272 is a wasteful number, since it uses less digits than its factorization.

64738272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674370 (or 674362 counting only the distinct ones).

The product of its digits is 112896, while the sum is 39.

The square root of 64738272 is about 8046.0096942522. The cubic root of 64738272 is about 401.5321901563.

The spelling of 64738272 in words is "sixty-four million, seven hundred thirty-eight thousand, two hundred seventy-two".