38999940 has 48 divisors (see below), whose sum is σ = 124801152. Its totient is φ = 8914176.

The previous prime is 38999911. The next prime is 38999959. The reversal of 38999940 is 4999983.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 46009 + ... + 46848.

It is an arithmetic number, because the mean of its divisors is an integer number (2600024).

Almost surely, 2^38999940 is an apocalyptic number.

38999940 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38999940 is an abundant number, since it is smaller than the sum of its proper divisors (85801212).

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

38999940 is a wasteful number, since it uses less digits than its factorization.

38999940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92876 (or 92874 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 51.

The square root of 38999940 is about 6244.9931945519. The cubic root of 38999940 is about 339.1209703930.

The spelling of 38999940 in words is "thirty-eight million, nine hundred ninety-nine thousand, nine hundred forty".