799778140 has 48 divisors (see below), whose sum is σ = 1921554432. Its totient is φ = 273911616.

The previous prime is 799778101. The next prime is 799778143. The reversal of 799778140 is 41877997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (799778143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154677 + ... + 159763.

It is an arithmetic number, because the mean of its divisors is an integer number (40032384).

Almost surely, 2^799778140 is an apocalyptic number.

799778140 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

799778140 is an abundant number, since it is smaller than the sum of its proper divisors (1121776292).

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

799778140 is a wasteful number, since it uses less digits than its factorization.

799778140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6226 (or 6224 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 52.

The square root of 799778140 is about 28280.3490077474. The cubic root of 799778140 is about 928.2319435469.

The spelling of 799778140 in words is "seven hundred ninety-nine million, seven hundred seventy-eight thousand, one hundred forty".