5398521786 has 36 divisors (see below), whose sum is σ = 13606480602. Its totient is φ = 1542434544.

The previous prime is 5398521763. The next prime is 5398521787. The reversal of 5398521786 is 6871258935.

5398521786 is a `hidden beast` number, since 5 + 39 + 8 + 521 + 7 + 86 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4875530625 + 522991161 = 69825^2 + 22869^2 .

It is not an unprimeable number, because it can be changed into a prime (5398521787) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3059505 + ... + 3061268.

Almost surely, 2^5398521786 is an apocalyptic number.

5398521786 is an abundant number, since it is smaller than the sum of its proper divisors (8207958816).

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

5398521786 is a wasteful number, since it uses less digits than its factorization.

5398521786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6120795 (or 6120785 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The square root of 5398521786 is about 73474.6336227681. The cubic root of 5398521786 is about 1754.2505422455.

The spelling of 5398521786 in words is "five billion, three hundred ninety-eight million, five hundred twenty-one thousand, seven hundred eighty-six".