38391916 has 18 divisors (see below), whose sum is σ = 71372588. Its totient is φ = 18066240.

The previous prime is 38391907. The next prime is 38391931. The reversal of 38391916 is 61919383.

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 in 5 ways as a sum of consecutive naturals, for example, 15450 + ... + 17761.

Almost surely, 2^38391916 is an apocalyptic number.

It is an amenable number.

38391916 is a deficient number, since it is larger than the sum of its proper divisors (32980672).

38391916 is a wasteful number, since it uses less digits than its factorization.

38391916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33249 (or 33230 counting only the distinct ones).

The product of its digits is 34992, while the sum is 40.

The square root of 38391916 is about 6196.1210446537. The cubic root of 38391916 is about 337.3493897728.

The spelling of 38391916 in words is "thirty-eight million, three hundred ninety-one thousand, nine hundred sixteen".