77993814 has 8 divisors (see below), whose sum is σ = 155987640. Its totient is φ = 25997936.

The previous prime is 77993813. The next prime is 77993833. The reversal of 77993814 is 41839977.

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

77993814 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77993813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6499479 + ... + 6499490.

It is an arithmetic number, because the mean of its divisors is an integer number (19498455).

Almost surely, 2^77993814 is an apocalyptic number.

77993814 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

77993814 is a wasteful number, since it uses less digits than its factorization.

77993814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12998974.

The product of its digits is 381024, while the sum is 48.

The square root of 77993814 is about 8831.4106460973. The cubic root of 77993814 is about 427.2545727145.

The spelling of 77993814 in words is "seventy-seven million, nine hundred ninety-three thousand, eight hundred fourteen".