38418690 has 16 divisors (see below), whose sum is σ = 92204928. Its totient is φ = 10244976.

The previous prime is 38418613. The next prime is 38418697. The reversal of 38418690 is 9681483.

It is a super-2 number, since 2×38418690² = 2951991482632200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (38418697) 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, 640282 + ... + 640341.

It is an arithmetic number, because the mean of its divisors is an integer number (5762808).

Almost surely, 2^38418690 is an apocalyptic number.

38418690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

38418690 is an abundant number, since it is smaller than the sum of its proper divisors (53786238).

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

38418690 is a wasteful number, since it uses less digits than its factorization.

38418690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280633.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 38418690 is about 6198.2812133688. The cubic root of 38418690 is about 337.4277925085.

The spelling of 38418690 in words is "thirty-eight million, four hundred eighteen thousand, six hundred ninety".