1688080976 has 20 divisors (see below), whose sum is σ = 3271600500. Its totient is φ = 843796992.

The previous prime is 1688080967. The next prime is 1688081033. The reversal of 1688080976 is 6790808861.

It can be written as a sum of positive squares in 2 ways, for example, as 446223376 + 1241857600 = 21124^2 + 35240^2 .

It is a super-2 number, since 2×1688080976² = 5699234763066225152, 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 3 ways as a sum of consecutive naturals, for example, 50600 + ... + 77048.

It is an arithmetic number, because the mean of its divisors is an integer number (163580025).

Almost surely, 2^1688080976 is an apocalyptic number.

1688080976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1688080976 is a deficient number, since it is larger than the sum of its proper divisors (1583519524).

1688080976 is a wasteful number, since it uses less digits than its factorization.

1688080976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30446 (or 30440 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 53.

The square root of 1688080976 is about 41086.2626190312. The cubic root of 1688080976 is about 1190.6874017312.

The spelling of 1688080976 in words is "one billion, six hundred eighty-eight million, eighty thousand, nine hundred seventy-six".