64938834 has 48 divisors (see below), whose sum is σ = 149516640. Its totient is φ = 21111840.

The previous prime is 64938817. The next prime is 64938847. The reversal of 64938834 is 43883946.

It is a super-2 number, since 2×64938834² = 8434104322559112, 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 64938834.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18297 + ... + 21555.

It is an arithmetic number, because the mean of its divisors is an integer number (3114930).

Almost surely, 2^64938834 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64938834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74758320).

64938834 is an abundant number, since it is smaller than the sum of its proper divisors (84577806).

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

64938834 is a wasteful number, since it uses less digits than its factorization.

64938834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3317 (or 3305 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 64938834 is about 8058.4635011893. The cubic root of 64938834 is about 401.9464174518.

The spelling of 64938834 in words is "sixty-four million, nine hundred thirty-eight thousand, eight hundred thirty-four".