38990100 has 36 divisors (see below), whose sum is σ = 112812224. Its totient is φ = 10397280.

The previous prime is 38990087. The next prime is 38990101. The reversal of 38990100 is 109983.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38990101) 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 11 ways as a sum of consecutive naturals, for example, 64684 + ... + 65283.

Almost surely, 2^38990100 is an apocalyptic number.

38990100 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38990100 is an abundant number, since it is smaller than the sum of its proper divisors (73822124).

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

38990100 is a wasteful number, since it uses less digits than its factorization.

38990100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129984 (or 129977 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 38990100 is about 6244.2053137289. The cubic root of 38990100 is about 339.0924470070.

The spelling of 38990100 in words is "thirty-eight million, nine hundred ninety thousand, one hundred".