77400868 has 12 divisors (see below), whose sum is σ = 135661680. Its totient is φ = 38640392.

The previous prime is 77400839. The next prime is 77400877. The reversal of 77400868 is 86800477.

It is a self number, because there is not a number n which added to its sum of digits gives 77400868.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12046 + ... + 17317.

It is an arithmetic number, because the mean of its divisors is an integer number (11305140).

Almost surely, 2^77400868 is an apocalyptic number.

It is an amenable number.

77400868 is a deficient number, since it is larger than the sum of its proper divisors (58260812).

77400868 is a wasteful number, since it uses less digits than its factorization.

77400868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30026 (or 30024 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 77400868 is about 8797.7763099547. The cubic root of 77400868 is about 426.1690865584.

The spelling of 77400868 in words is "seventy-seven million, four hundred thousand, eight hundred sixty-eight".