39955218 has 32 divisors (see below), whose sum is σ = 83261952. Its totient is φ = 12768000.

The previous prime is 39955211. The next prime is 39955229. The reversal of 39955218 is 81255993.

It is a self number, because there is not a number n which added to its sum of digits gives 39955218.

It is not an unprimeable number, because it can be changed into a prime (39955211) by changing a digit.

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, 20068 + ... + 21968.

It is an arithmetic number, because the mean of its divisors is an integer number (2601936).

Almost surely, 2^39955218 is an apocalyptic number.

39955218 is an abundant number, since it is smaller than the sum of its proper divisors (43306734).

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

39955218 is a wasteful number, since it uses less digits than its factorization.

39955218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050.

The product of its digits is 97200, while the sum is 42.

The square root of 39955218 is about 6321.0140009337. The cubic root of 39955218 is about 341.8675147727.

The spelling of 39955218 in words is "thirty-nine million, nine hundred fifty-five thousand, two hundred eighteen".