776628040 has 32 divisors (see below), whose sum is σ = 1839384000. Its totient is φ = 294300864.

The previous prime is 776628019. The next prime is 776628049. The reversal of 776628040 is 40826677.

It is a super-2 number, since 2×776628040² = 1206302225028483200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 776627984 and 776628002.

It is not an unprimeable number, because it can be changed into a prime (776628049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 510180 + ... + 511699.

It is an arithmetic number, because the mean of its divisors is an integer number (57480750).

Almost surely, 2^776628040 is an apocalyptic number.

It is an amenable number.

776628040 is an abundant number, since it is smaller than the sum of its proper divisors (1062755960).

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

776628040 is a wasteful number, since it uses less digits than its factorization.

776628040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021909 (or 1021905 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 776628040 is about 27868.0469355138. The cubic root of 776628040 is about 919.1880201781.

The spelling of 776628040 in words is "seven hundred seventy-six million, six hundred twenty-eight thousand, forty".