77899628 has 6 divisors (see below), whose sum is σ = 136324356. Its totient is φ = 38949812.

The previous prime is 77899603. The next prime is 77899649. The reversal of 77899628 is 82699877.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9737450 + ... + 9737457.

It is an arithmetic number, because the mean of its divisors is an integer number (22720726).

Almost surely, 2^77899628 is an apocalyptic number.

It is an amenable number.

77899628 is a deficient number, since it is larger than the sum of its proper divisors (58424728).

77899628 is a wasteful number, since it uses less digits than its factorization.

77899628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19474911 (or 19474909 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 56.

The square root of 77899628 is about 8826.0765915553. The cubic root of 77899628 is about 427.0825180065.

The spelling of 77899628 in words is "seventy-seven million, eight hundred ninety-nine thousand, six hundred twenty-eight".