38981864 has 8 divisors (see below), whose sum is σ = 73091010. Its totient is φ = 19490928.

The previous prime is 38981837. The next prime is 38981893. The reversal of 38981864 is 46818983.

It can be written as a sum of positive squares in only one way, i.e., 37920964 + 1060900 = 6158^2 + 1030^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2436359 + ... + 2436374.

Almost surely, 2^38981864 is an apocalyptic number.

It is an amenable number.

38981864 is a deficient number, since it is larger than the sum of its proper divisors (34109146).

38981864 is a wasteful number, since it uses less digits than its factorization.

38981864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4872739 (or 4872735 counting only the distinct ones).

The product of its digits is 331776, while the sum is 47.

The square root of 38981864 is about 6243.5457874512. The cubic root of 38981864 is about 339.0685694752.

The spelling of 38981864 in words is "thirty-eight million, nine hundred eighty-one thousand, eight hundred sixty-four".