787998280 has 32 divisors (see below), whose sum is σ = 1877291640. Its totient is φ = 296657920.

The previous prime is 787998251. The next prime is 787998301. The reversal of 787998280 is 82899787.

It can be written as a sum of positive squares in 4 ways, for example, as 776068164 + 11930116 = 27858^2 + 3454^2 .

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, 578731 + ... + 580090.

Almost surely, 2^787998280 is an apocalyptic number.

It is an amenable number.

787998280 is an abundant number, since it is smaller than the sum of its proper divisors (1089293360).

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

787998280 is a wasteful number, since it uses less digits than its factorization.

787998280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158849 (or 1158845 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 58.

The square root of 787998280 is about 28071.3070589882. The cubic root of 787998280 is about 923.6521025576.

The spelling of 787998280 in words is "seven hundred eighty-seven million, nine hundred ninety-eight thousand, two hundred eighty".