39218838 has 32 divisors (see below), whose sum is σ = 81430272. Its totient is φ = 12583200.

The previous prime is 39218833. The next prime is 39218857. The reversal of 39218838 is 83881293.

It is a self number, because there is not a number n which added to its sum of digits gives 39218838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39218833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17248 + ... + 19388.

It is an arithmetic number, because the mean of its divisors is an integer number (2544696).

Almost surely, 2^39218838 is an apocalyptic number.

39218838 is an abundant number, since it is smaller than the sum of its proper divisors (42211434).

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

39218838 is a wasteful number, since it uses less digits than its factorization.

39218838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2260.

The product of its digits is 82944, while the sum is 42.

The square root of 39218838 is about 6262.4945508958. The cubic root of 39218838 is about 339.7542572594.

Subtracting from 39218838 its sum of digits (42), we obtain a triangular number (39218796 = T₈₈₅₆).

The spelling of 39218838 in words is "thirty-nine million, two hundred eighteen thousand, eight hundred thirty-eight".