438078452897988 has 72 divisors (see below), whose sum is σ = 1265568155342400. Its totient is φ = 125164463215680.

The previous prime is 438078452897977. The next prime is 438078452898077. The reversal of 438078452897988 is 889798254870834.

438078452897988 is a `hidden beast` number, since 4 + 3 + 8 + 0 + 7 + 8 + 4 + 528 + 9 + 79 + 8 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 438078452897898 and 438078452897907.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33998658 + ... + 45078438.

Almost surely, 2^{438078452897988} is an apocalyptic number.

It is an amenable number.

438078452897988 is an abundant number, since it is smaller than the sum of its proper divisors (827489702444412).

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

438078452897988 is a wasteful number, since it uses less digits than its factorization.

438078452897988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11236697 (or 11236692 counting only the distinct ones).

The product of its (nonzero) digits is 62426972160, while the sum is 90.

The spelling of 438078452897988 in words is "four hundred thirty-eight trillion, seventy-eight billion, four hundred fifty-two million, eight hundred ninety-seven thousand, nine hundred eighty-eight".