64938986 has 16 divisors (see below), whose sum is σ = 114915840. Its totient is φ = 26933040.

The previous prime is 64938983. The next prime is 64938989. The reversal of 64938986 is 68983946.

It is an interprime number because it is at equal distance from previous prime (64938983) and next prime (64938989).

It is not an unprimeable number, because it can be changed into a prime (64938983) 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, 74381 + ... + 75248.

It is an arithmetic number, because the mean of its divisors is an integer number (7182240).

Almost surely, 2^64938986 is an apocalyptic number.

64938986 is a deficient number, since it is larger than the sum of its proper divisors (49976854).

64938986 is a wasteful number, since it uses less digits than its factorization.

64938986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149669.

The product of its digits is 2239488, while the sum is 53.

The square root of 64938986 is about 8058.4729322620. The cubic root of 64938986 is about 401.9467310587.

The spelling of 64938986 in words is "sixty-four million, nine hundred thirty-eight thousand, nine hundred eighty-six".