64738239 has 8 divisors (see below), whose sum is σ = 86646912. Its totient is φ = 42994200.

The previous prime is 64738229. The next prime is 64738241. The reversal of 64738239 is 93283746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64738239 - 2¹² = 64734143 is a prime.

It is a super-2 number, since 2×64738239² = 8382079177642242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64738239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64738229) 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, 40237 + ... + 41814.

It is an arithmetic number, because the mean of its divisors is an integer number (10830864).

Almost surely, 2^64738239 is an apocalyptic number.

64738239 is a deficient number, since it is larger than the sum of its proper divisors (21908673).

64738239 is a wasteful number, since it uses less digits than its factorization.

64738239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82317.

The product of its digits is 217728, while the sum is 42.

The square root of 64738239 is about 8046.0076435460. The cubic root of 64738239 is about 401.5321219299.

The spelling of 64738239 in words is "sixty-four million, seven hundred thirty-eight thousand, two hundred thirty-nine".