689440798 has 16 divisors (see below), whose sum is σ = 1044933120. Its totient is φ = 341139456.

The previous prime is 689440781. The next prime is 689440819. The reversal of 689440798 is 897044986.

It is a super-2 number, since 2×689440798² = 950657227893753608, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171811 + ... + 175777.

It is an arithmetic number, because the mean of its divisors is an integer number (65308320).

Almost surely, 2^689440798 is an apocalyptic number.

689440798 is a deficient number, since it is larger than the sum of its proper divisors (355492322).

689440798 is a wasteful number, since it uses less digits than its factorization.

689440798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4851.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The square root of 689440798 is about 26257.2046874758. The cubic root of 689440798 is about 883.4168117935.

The spelling of 689440798 in words is "six hundred eighty-nine million, four hundred forty thousand, seven hundred ninety-eight".