689407692 has 12 divisors (see below), whose sum is σ = 1608617976. Its totient is φ = 229802560.

The previous prime is 689407639. The next prime is 689407709. The reversal of 689407692 is 296704986.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28725309 + ... + 28725332.

It is an arithmetic number, because the mean of its divisors is an integer number (134051498).

Almost surely, 2^689407692 is an apocalyptic number.

It is an amenable number.

689407692 is an abundant number, since it is smaller than the sum of its proper divisors (919210284).

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

689407692 is a wasteful number, since it uses less digits than its factorization.

689407692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57450648 (or 57450646 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 51.

The square root of 689407692 is about 26256.5742624585. The cubic root of 689407692 is about 883.4026714132.

The spelling of 689407692 in words is "six hundred eighty-nine million, four hundred seven thousand, six hundred ninety-two".