76691540 has 12 divisors (see below), whose sum is σ = 161052276. Its totient is φ = 30676608.

The previous prime is 76691533. The next prime is 76691557. The reversal of 76691540 is 4519667.

It can be written as a sum of positive squares in 2 ways, for example, as 42562576 + 34128964 = 6524^2 + 5842^2 .

It is a junction number, because it is equal to n+sod(n) for n = 76691494 and 76691503.

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, 1917269 + ... + 1917308.

It is an arithmetic number, because the mean of its divisors is an integer number (13421023).

Almost surely, 2^76691540 is an apocalyptic number.

It is an amenable number.

76691540 is an abundant number, since it is smaller than the sum of its proper divisors (84360736).

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

76691540 is a wasteful number, since it uses less digits than its factorization.

76691540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3834586 (or 3834584 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 76691540 is about 8757.3706099491. The cubic root of 76691540 is about 424.8632362714.

The spelling of 76691540 in words is "seventy-six million, six hundred ninety-one thousand, five hundred forty".