776891136 has 72 divisors (see below), whose sum is σ = 2363060224. Its totient is φ = 221967360.

The previous prime is 776891117. The next prime is 776891161. The reversal of 776891136 is 631198677.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66880 + ... + 77631.

Almost surely, 2^776891136 is an apocalyptic number.

It is an amenable number.

776891136 is an abundant number, since it is smaller than the sum of its proper divisors (1586169088).

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

776891136 is a wasteful number, since it uses less digits than its factorization.

776891136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144537 (or 144523 counting only the distinct ones).

The product of its digits is 381024, while the sum is 48.

The square root of 776891136 is about 27872.7669240067. The cubic root of 776891136 is about 919.2918053346.

The spelling of 776891136 in words is "seven hundred seventy-six million, eight hundred ninety-one thousand, one hundred thirty-six".