691425882 has 112 divisors (see below), whose sum is σ = 1826166912. Its totient is φ = 192106080.

The previous prime is 691425881. The next prime is 691425899. The reversal of 691425882 is 288524196.

691425882 is a `hidden beast` number, since 69 + 1 + 4 + 2 + 588 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (691425881) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 376707 + ... + 378537.

Almost surely, 2^691425882 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 691425882, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (913083456).

691425882 is an abundant number, since it is smaller than the sum of its proper divisors (1134741030).

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

691425882 is a wasteful number, since it uses less digits than its factorization.

691425882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1895 (or 1880 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 691425882 is about 26294.9782658210. The cubic root of 691425882 is about 884.2638635823.

The spelling of 691425882 in words is "six hundred ninety-one million, four hundred twenty-five thousand, eight hundred eighty-two".