38117916 has 36 divisors (see below), whose sum is σ = 97522152. Its totient is φ = 12551904.

The previous prime is 38117903. The next prime is 38117939. The reversal of 38117916 is 61971183.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3391 + ... + 9366.

Almost surely, 2^38117916 is an apocalyptic number.

38117916 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

38117916 is an abundant number, since it is smaller than the sum of its proper divisors (59404236).

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

38117916 is a wasteful number, since it uses less digits than its factorization.

38117916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12850 (or 12845 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 38117916 is about 6173.9708454122. The cubic root of 38117916 is about 336.5449278282.

The spelling of 38117916 in words is "thirty-eight million, one hundred seventeen thousand, nine hundred sixteen".