776992140 has 72 divisors (see below), whose sum is σ = 2495525760. Its totient is φ = 195009024.

The previous prime is 776992103. The next prime is 776992201. The reversal of 776992140 is 41299677.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123900 + ... + 130019.

It is an arithmetic number, because the mean of its divisors is an integer number (34660080).

Almost surely, 2^776992140 is an apocalyptic number.

It is an amenable number.

776992140 is an abundant number, since it is smaller than the sum of its proper divisors (1718533620).

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

776992140 is a wasteful number, since it uses less digits than its factorization.

776992140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253951 (or 253946 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 776992140 is about 27874.5787412115. The cubic root of 776992140 is about 919.3316428020.

The spelling of 776992140 in words is "seven hundred seventy-six million, nine hundred ninety-two thousand, one hundred forty".