38391216 has 20 divisors (see below), whose sum is σ = 99177432. Its totient is φ = 12797056.

The previous prime is 38391187. The next prime is 38391233. The reversal of 38391216 is 61219383.

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, 399861 + ... + 399956.

Almost surely, 2^38391216 is an apocalyptic number.

It is an amenable number.

38391216 is an abundant number, since it is smaller than the sum of its proper divisors (60786216).

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

38391216 is a wasteful number, since it uses less digits than its factorization.

38391216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799828 (or 799822 counting only the distinct ones).

The product of its digits is 7776, while the sum is 33.

The square root of 38391216 is about 6196.0645574429. The cubic root of 38391216 is about 337.3473394627.

The spelling of 38391216 in words is "thirty-eight million, three hundred ninety-one thousand, two hundred sixteen".