438189540912 has 40 divisors (see below), whose sum is σ = 1257766276080. Its totient is φ = 146063180160.

The previous prime is 438189540907. The next prime is 438189540931. The reversal of 438189540912 is 219045981834.

It is a happy number.

438189540912 is a `hidden beast` number, since 4 + 3 + 8 + 1 + 8 + 9 + 540 + 91 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 507163389 + ... + 507164252.

It is an arithmetic number, because the mean of its divisors is an integer number (31444156902).

Almost surely, 2^438189540912 is an apocalyptic number.

It is an amenable number.

438189540912 is an abundant number, since it is smaller than the sum of its proper divisors (819576735168).

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

438189540912 is a wasteful number, since it uses less digits than its factorization.

438189540912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014327658 (or 1014327646 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The spelling of 438189540912 in words is "four hundred thirty-eight billion, one hundred eighty-nine million, five hundred forty thousand, nine hundred twelve".