7158864438 has 48 divisors (see below), whose sum is σ = 16927372800. Its totient is φ = 2168529840.

The previous prime is 7158864437. The next prime is 7158864463. The reversal of 7158864438 is 8344688517.

7158864438 is a `hidden beast` number, since 71 + 5 + 88 + 64 + 438 = 666.

It is a super-2 number, since 2×7158864438² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7158864437) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 699603 + ... + 709761.

It is an arithmetic number, because the mean of its divisors is an integer number (352653600).

Almost surely, 2^7158864438 is an apocalyptic number.

7158864438 is an abundant number, since it is smaller than the sum of its proper divisors (9768508362).

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

7158864438 is a wasteful number, since it uses less digits than its factorization.

7158864438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13737 (or 13734 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 54.

The square root of 7158864438 is about 84610.0729109720. The cubic root of 7158864438 is about 1927.2943409295.

The spelling of 7158864438 in words is "seven billion, one hundred fifty-eight million, eight hundred sixty-four thousand, four hundred thirty-eight".