38991199 has 8 divisors (see below), whose sum is σ = 42783552. Its totient is φ = 35312160.

The previous prime is 38991193. The next prime is 38991221. The reversal of 38991199 is 99119983.

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

It is not a de Polignac number, because 38991199 - 2¹⁵ = 38958431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38991193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27607 + ... + 28984.

It is an arithmetic number, because the mean of its divisors is an integer number (5347944).

Almost surely, 2^38991199 is an apocalyptic number.

38991199 is a deficient number, since it is larger than the sum of its proper divisors (3792353).

38991199 is a wasteful number, since it uses less digits than its factorization.

38991199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56657.

The product of its digits is 157464, while the sum is 49.

The square root of 38991199 is about 6244.2933146994. The cubic root of 38991199 is about 339.0956329362.

The spelling of 38991199 in words is "thirty-eight million, nine hundred ninety-one thousand, one hundred ninety-nine".