38243990 has 16 divisors (see below), whose sum is σ = 68988240. Its totient is φ = 15264480.

The previous prime is 38243971. The next prime is 38244013. The reversal of 38243990 is 9934283.

38243990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×38243990² = 2925205542240200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1016 + ... + 8804.

It is an arithmetic number, because the mean of its divisors is an integer number (4311765).

Almost surely, 2^38243990 is an apocalyptic number.

38243990 is a deficient number, since it is larger than the sum of its proper divisors (30744250).

38243990 is a wasteful number, since it uses less digits than its factorization.

38243990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8287.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 38243990 is about 6184.1725396370. The cubic root of 38243990 is about 336.9155573311.

The spelling of 38243990 in words is "thirty-eight million, two hundred forty-three thousand, nine hundred ninety".