76461978 has 8 divisors (see below), whose sum is σ = 152923968. Its totient is φ = 25487324.

The previous prime is 76461977. The next prime is 76461989. The reversal of 76461978 is 87916467.

It is a sphenic number, since it is the product of 3 distinct primes.

76461978 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (76461977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6371826 + ... + 6371837.

It is an arithmetic number, because the mean of its divisors is an integer number (19115496).

Almost surely, 2^76461978 is an apocalyptic number.

76461978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

76461978 is a wasteful number, since it uses less digits than its factorization.

76461978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12743668.

The product of its digits is 508032, while the sum is 48.

The square root of 76461978 is about 8744.2539990556. The cubic root of 76461978 is about 424.4388959789.

The spelling of 76461978 in words is "seventy-six million, four hundred sixty-one thousand, nine hundred seventy-eight".