76389978 has 32 divisors (see below), whose sum is σ = 179328384. Its totient is φ = 21235392.

The previous prime is 76389977. The next prime is 76389991. The reversal of 76389978 is 87998367.

It is not an unprimeable number, because it can be changed into a prime (76389977) 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, 23025 + ... + 26132.

It is an arithmetic number, because the mean of its divisors is an integer number (5604012).

Almost surely, 2^76389978 is an apocalyptic number.

76389978 is an abundant number, since it is smaller than the sum of its proper divisors (102938406).

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

76389978 is a wasteful number, since it uses less digits than its factorization.

76389978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49206.

The product of its digits is 4572288, while the sum is 57.

The square root of 76389978 is about 8740.1360401312. The cubic root of 76389978 is about 424.3056306252.

The spelling of 76389978 in words is "seventy-six million, three hundred eighty-nine thousand, nine hundred seventy-eight".