76878690 has 64 divisors (see below), whose sum is σ = 216034560. Its totient is φ = 17141760.

The previous prime is 76878689. The next prime is 76878707. The reversal of 76878690 is 9687867.

It is a happy number.

It is a super-2 number, since 2×76878690² = 11820665952232200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4146 + ... + 13074.

It is an arithmetic number, because the mean of its divisors is an integer number (3375540).

Almost surely, 2^76878690 is an apocalyptic number.

76878690 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 76878690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108017280).

76878690 is an abundant number, since it is smaller than the sum of its proper divisors (139155870).

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

76878690 is a wasteful number, since it uses less digits than its factorization.

76878690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8987.

The product of its (nonzero) digits is 1016064, while the sum is 51.

The square root of 76878690 is about 8768.0493839850. The cubic root of 76878690 is about 425.2085527765.

The spelling of 76878690 in words is "seventy-six million, eight hundred seventy-eight thousand, six hundred ninety".