77814842 has 72 divisors (see below), whose sum is σ = 151300800. Its totient is φ = 29837808.

The previous prime is 77814839. The next prime is 77814871. The reversal of 77814842 is 24841877.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 77814842.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 984959 + ... + 985037.

It is an arithmetic number, because the mean of its divisors is an integer number (2101400).

Almost surely, 2^77814842 is an apocalyptic number.

77814842 is a deficient number, since it is larger than the sum of its proper divisors (73485958).

77814842 is a wasteful number, since it uses less digits than its factorization.

77814842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 130 counting only the distinct ones).

The product of its digits is 100352, while the sum is 41.

The square root of 77814842 is about 8821.2721304810. The cubic root of 77814842 is about 426.9275161386.

The spelling of 77814842 in words is "seventy-seven million, eight hundred fourteen thousand, eight hundred forty-two".