38311218 has 40 divisors (see below), whose sum is σ = 93654000. Its totient is φ = 11608920.

The previous prime is 38311213. The next prime is 38311241. The reversal of 38311218 is 81211383.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 38311191 and 38311200.

It is not an unprimeable number, because it can be changed into a prime (38311213) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8968 + ... + 12531.

It is an arithmetic number, because the mean of its divisors is an integer number (2341350).

Almost surely, 2^38311218 is an apocalyptic number.

38311218 is an abundant number, since it is smaller than the sum of its proper divisors (55342782).

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

38311218 is a wasteful number, since it uses less digits than its factorization.

38311218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21524 (or 21515 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 38311218 is about 6189.6056417190. The cubic root of 38311218 is about 337.1128597919.

The spelling of 38311218 in words is "thirty-eight million, three hundred eleven thousand, two hundred eighteen".