76990381 has 16 divisors (see below), whose sum is σ = 84446208. Its totient is φ = 69768000.

The previous prime is 76990379. The next prime is 76990393. The reversal of 76990381 is 18309967.

It is a cyclic number.

It is not a de Polignac number, because 76990381 - 2¹ = 76990379 is a prime.

It is a super-2 number, since 2×76990381² = 11855037533050322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76990351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 250630 + ... + 250936.

It is an arithmetic number, because the mean of its divisors is an integer number (5277888).

Almost surely, 2^76990381 is an apocalyptic number.

It is an amenable number.

76990381 is a deficient number, since it is larger than the sum of its proper divisors (7455827).

76990381 is a wasteful number, since it uses less digits than its factorization.

76990381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 76990381 is about 8774.4162768813. The cubic root of 76990381 is about 425.4143704870.

The spelling of 76990381 in words is "seventy-six million, nine hundred ninety thousand, three hundred eighty-one".