76991590 has 32 divisors (see below), whose sum is σ = 149960160. Its totient is φ = 28291584.

The previous prime is 76991587. The next prime is 76991597. The reversal of 76991590 is 9519967.

It is a self number, because there is not a number n which added to its sum of digits gives 76991590.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76991597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28206 + ... + 30814.

It is an arithmetic number, because the mean of its divisors is an integer number (4686255).

Almost surely, 2^76991590 is an apocalyptic number.

76991590 is a deficient number, since it is larger than the sum of its proper divisors (72968570).

76991590 is a wasteful number, since it uses less digits than its factorization.

76991590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2856.

The product of its (nonzero) digits is 153090, while the sum is 46.

The square root of 76991590 is about 8774.4851700826. The cubic root of 76991590 is about 425.4165972729.

The spelling of 76991590 in words is "seventy-six million, nine hundred ninety-one thousand, five hundred ninety".