38991774 has 8 divisors (see below), whose sum is σ = 77983560. Its totient is φ = 12997256.

The previous prime is 38991767. The next prime is 38991803. The reversal of 38991774 is 47719983.

It is a sphenic number, since it is the product of 3 distinct primes.

38991774 is an admirable number.

It is a congruent number.

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, 3249309 + ... + 3249320.

It is an arithmetic number, because the mean of its divisors is an integer number (9747945).

Almost surely, 2^38991774 is an apocalyptic number.

38991774 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

38991774 is a wasteful number, since it uses less digits than its factorization.

38991774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6498634.

The product of its digits is 381024, while the sum is 48.

The square root of 38991774 is about 6244.3393565693. The cubic root of 38991774 is about 339.0972997998.

The spelling of 38991774 in words is "thirty-eight million, nine hundred ninety-one thousand, seven hundred seventy-four".