77400814 has 8 divisors (see below), whose sum is σ = 116138808. Its totient is φ = 38687880.

The previous prime is 77400811. The next prime is 77400823. The reversal of 77400814 is 41800477.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77400811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7564 + ... + 14560.

It is an arithmetic number, because the mean of its divisors is an integer number (14517351).

Almost surely, 2^77400814 is an apocalyptic number.

77400814 is a deficient number, since it is larger than the sum of its proper divisors (38737994).

77400814 is a wasteful number, since it uses less digits than its factorization.

77400814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12530.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 77400814 is about 8797.7732409968. The cubic root of 77400814 is about 426.1689874504.

The spelling of 77400814 in words is "seventy-seven million, four hundred thousand, eight hundred fourteen".