77628998 has 16 divisors (see below), whose sum is σ = 121338000. Its totient is φ = 37202592.

The previous prime is 77628977. The next prime is 77629063. The reversal of 77628998 is 89982677.

It is a super-2 number, since 2×77628998² = 12052522660968008, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3248 + ... + 12876.

It is an arithmetic number, because the mean of its divisors is an integer number (7583625).

Almost surely, 2^77628998 is an apocalyptic number.

77628998 is a deficient number, since it is larger than the sum of its proper divisors (43709002).

77628998 is a wasteful number, since it uses less digits than its factorization.

77628998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9799.

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

The square root of 77628998 is about 8810.7319786724. The cubic root of 77628998 is about 426.5873703819.

The spelling of 77628998 in words is "seventy-seven million, six hundred twenty-eight thousand, nine hundred ninety-eight".