776405056 has 112 divisors (see below), whose sum is σ = 1889516160. Its totient is φ = 309104640.

The previous prime is 776405053. The next prime is 776405057. The reversal of 776405056 is 650504677.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is not an unprimeable number, because it can be changed into a prime (776405053) 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, 450276 + ... + 451996.

It is an arithmetic number, because the mean of its divisors is an integer number (16870680).

Almost surely, 2^776405056 is an apocalyptic number.

776405056 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 776405056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (944758080).

776405056 is an abundant number, since it is smaller than the sum of its proper divisors (1113111104).

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

776405056 is a wasteful number, since it uses less digits than its factorization.

776405056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812 (or 1802 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 40.

The square root of 776405056 is about 27864.0459373724. The cubic root of 776405056 is about 919.1000399051.

The spelling of 776405056 in words is "seven hundred seventy-six million, four hundred five thousand, fifty-six".