77989814 has 8 divisors (see below), whose sum is σ = 133696848. Its totient is φ = 33424200.

The previous prime is 77989801. The next prime is 77989817. The reversal of 77989814 is 41898977.

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

It is a super-2 number, since 2×77989814² = 12164822175509192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77989817) 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, 2785337 + ... + 2785364.

It is an arithmetic number, because the mean of its divisors is an integer number (16712106).

Almost surely, 2^77989814 is an apocalyptic number.

77989814 is a deficient number, since it is larger than the sum of its proper divisors (55707034).

77989814 is a wasteful number, since it uses less digits than its factorization.

77989814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5570710.

The product of its digits is 1016064, while the sum is 53.

The square root of 77989814 is about 8831.1841788064. The cubic root of 77989814 is about 427.2472685134.

The spelling of 77989814 in words is "seventy-seven million, nine hundred eighty-nine thousand, eight hundred fourteen".