77798994 has 64 divisors (see below), whose sum is σ = 193777920. Its totient is φ = 20275200.

The previous prime is 77798989. The next prime is 77799023. The reversal of 77798994 is 49989777.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47794 + ... + 49394.

It is an arithmetic number, because the mean of its divisors is an integer number (3027780).

Almost surely, 2^77798994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77798994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96888960).

77798994 is an abundant number, since it is smaller than the sum of its proper divisors (115978926).

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

77798994 is a wasteful number, since it uses less digits than its factorization.

77798994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715.

The product of its digits is 8001504, while the sum is 60.

The square root of 77798994 is about 8820.3738016027. The cubic root of 77798994 is about 426.8985310655.

The spelling of 77798994 in words is "seventy-seven million, seven hundred ninety-eight thousand, nine hundred ninety-four".