787979816 has 128 divisors (see below), whose sum is σ = 1745694720. Its totient is φ = 330511104.

The previous prime is 787979807. The next prime is 787979873. The reversal of 787979816 is 618979787.

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, 4834151 + ... + 4834313.

It is an arithmetic number, because the mean of its divisors is an integer number (13638240).

Almost surely, 2^787979816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 787979816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (872847360).

787979816 is an abundant number, since it is smaller than the sum of its proper divisors (957714904).

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

787979816 is a wasteful number, since it uses less digits than its factorization.

787979816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295 (or 291 counting only the distinct ones).

The product of its digits is 10668672, while the sum is 62.

The square root of 787979816 is about 28070.9781803200. The cubic root of 787979816 is about 923.6448883094.

The spelling of 787979816 in words is "seven hundred eighty-seven million, nine hundred seventy-nine thousand, eight hundred sixteen".