77400056 has 32 divisors (see below), whose sum is σ = 150353280. Its totient is φ = 37315200.

The previous prime is 77400019. The next prime is 77400077. The reversal of 77400056 is 65000477.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113990 + ... + 114666.

It is an arithmetic number, because the mean of its divisors is an integer number (4698540).

Almost surely, 2^77400056 is an apocalyptic number.

It is an amenable number.

77400056 is a deficient number, since it is larger than the sum of its proper divisors (72953224).

77400056 is a wasteful number, since it uses less digits than its factorization.

77400056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175 (or 1171 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 77400056 is about 8797.7301618088. The cubic root of 77400056 is about 426.1675962628.

The spelling of 77400056 in words is "seventy-seven million, four hundred thousand, fifty-six".