40218239172 has 48 divisors (see below), whose sum is σ = 94265301312. Its totient is φ = 13345812480.

The previous prime is 40218239147. The next prime is 40218239177. The reversal of 40218239172 is 27193281204.

It is a self number, because there is not a number n which added to its sum of digits gives 40218239172.

It is not an unprimeable number, because it can be changed into a prime (40218239177) 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, 2754772 + ... + 2769332.

It is an arithmetic number, because the mean of its divisors is an integer number (1963860444).

Almost surely, 2^40218239172 is an apocalyptic number.

It is an amenable number.

40218239172 is an abundant number, since it is smaller than the sum of its proper divisors (54047062140).

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

40218239172 is a wasteful number, since it uses less digits than its factorization.

40218239172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15588 (or 15586 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 40218239172 in words is "forty billion, two hundred eighteen million, two hundred thirty-nine thousand, one hundred seventy-two".