77984994 has 8 divisors (see below), whose sum is σ = 155970000. Its totient is φ = 25994996.

The previous prime is 77984989. The next prime is 77984999. The reversal of 77984994 is 49948977.

It is an interprime number because it is at equal distance from previous prime (77984989) and next prime (77984999).

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

77984994 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (77984999) 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, 6498744 + ... + 6498755.

It is an arithmetic number, because the mean of its divisors is an integer number (19496250).

Almost surely, 2^77984994 is an apocalyptic number.

77984994 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.

77984994 is a wasteful number, since it uses less digits than its factorization.

77984994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12997504.

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

The square root of 77984994 is about 8830.9112780052. The cubic root of 77984994 is about 427.2384666193.

The spelling of 77984994 in words is "seventy-seven million, nine hundred eighty-four thousand, nine hundred ninety-four".