38991108 has 24 divisors (see below), whose sum is σ = 97978048. Its totient is φ = 11997216.

The previous prime is 38991103. The next prime is 38991131. The reversal of 38991108 is 80119983.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (38991101) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 124816 + ... + 125127.

Almost surely, 2^38991108 is an apocalyptic number.

It is an amenable number.

38991108 is an abundant number, since it is smaller than the sum of its proper divisors (58986940).

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

38991108 is a wasteful number, since it uses less digits than its factorization.

38991108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249963 (or 249961 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 38991108 is about 6244.2860280420. The cubic root of 38991108 is about 339.0953691354.

The spelling of 38991108 in words is "thirty-eight million, nine hundred ninety-one thousand, one hundred eight".