64678734 has 24 divisors (see below), whose sum is σ = 140369112. Its totient is φ = 21523920.

The previous prime is 64678723. The next prime is 64678759. The reversal of 64678734 is 43787646.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64678734.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9664 + ... + 14924.

It is an arithmetic number, because the mean of its divisors is an integer number (5848713).

Almost surely, 2^64678734 is an apocalyptic number.

64678734 is an abundant number, since it is smaller than the sum of its proper divisors (75690378).

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

64678734 is a wasteful number, since it uses less digits than its factorization.

64678734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5952 (or 5949 counting only the distinct ones).

The product of its digits is 677376, while the sum is 45.

The square root of 64678734 is about 8042.3089967994. The cubic root of 64678734 is about 401.4090597151.

The spelling of 64678734 in words is "sixty-four million, six hundred seventy-eight thousand, seven hundred thirty-four".