64013998 has 8 divisors (see below), whose sum is σ = 96080040. Its totient is φ = 31987320.

The previous prime is 64013981. The next prime is 64014001. The reversal of 64013998 is 89931046.

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

It is a self number, because there is not a number n which added to its sum of digits gives 64013998.

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, 5368 + ... + 12523.

It is an arithmetic number, because the mean of its divisors is an integer number (12010005).

Almost surely, 2^64013998 is an apocalyptic number.

64013998 is a deficient number, since it is larger than the sum of its proper divisors (32066042).

64013998 is a wasteful number, since it uses less digits than its factorization.

64013998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19682.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 64013998 is about 8000.8748271673. The cubic root of 64013998 is about 400.0291603741.

The spelling of 64013998 in words is "sixty-four million, thirteen thousand, nine hundred ninety-eight".