98778660 has 24 divisors (see below), whose sum is σ = 276580416. Its totient is φ = 26340960.

The previous prime is 98778593. The next prime is 98778671. The reversal of 98778660 is 6687789.

It is a happy 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, 823096 + ... + 823215.

It is an arithmetic number, because the mean of its divisors is an integer number (11524184).

Almost surely, 2^98778660 is an apocalyptic number.

It is an amenable number.

98778660 is an abundant number, since it is smaller than the sum of its proper divisors (177801756).

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

98778660 is a wasteful number, since it uses less digits than its factorization.

98778660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646323 (or 1646321 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 51.

The square root of 98778660 is about 9938.7453936601. The cubic root of 98778660 is about 462.2614850034.

The spelling of 98778660 in words is "ninety-eight million, seven hundred seventy-eight thousand, six hundred sixty".