787981628 has 24 divisors (see below), whose sum is σ = 1584777600. Its totient is φ = 335817648.

The previous prime is 787981567. The next prime is 787981673. The reversal of 787981628 is 826189787.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73598 + ... + 83621.

It is an arithmetic number, because the mean of its divisors is an integer number (66032400).

Almost surely, 2^787981628 is an apocalyptic number.

It is an amenable number.

787981628 is an abundant number, since it is smaller than the sum of its proper divisors (796795972).

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

787981628 is a wasteful number, since it uses less digits than its factorization.

787981628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157409 (or 157407 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 56.

The square root of 787981628 is about 28071.0104556284. The cubic root of 787981628 is about 923.6455962984.

The spelling of 787981628 in words is "seven hundred eighty-seven million, nine hundred eighty-one thousand, six hundred twenty-eight".