64939854 has 32 divisors (see below), whose sum is σ = 153225216. Its totient is φ = 17955360.

The previous prime is 64939843. The next prime is 64939873. The reversal of 64939854 is 45893946.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23637 + ... + 26240.

It is an arithmetic number, because the mean of its divisors is an integer number (4788288).

Almost surely, 2^64939854 is an apocalyptic number.

64939854 is an abundant number, since it is smaller than the sum of its proper divisors (88285362).

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

64939854 is a wasteful number, since it uses less digits than its factorization.

64939854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49920.

The product of its digits is 933120, while the sum is 48.

The square root of 64939854 is about 8058.5267884397. The cubic root of 64939854 is about 401.9485219100.

The spelling of 64939854 in words is "sixty-four million, nine hundred thirty-nine thousand, eight hundred fifty-four".