77648942 has 16 divisors (see below), whose sum is σ = 134799360. Its totient is φ = 32856408.

The previous prime is 77648939. The next prime is 77648981. The reversal of 77648942 is 24984677.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 33998 + ... + 36209.

It is an arithmetic number, because the mean of its divisors is an integer number (8424960).

Almost surely, 2^77648942 is an apocalyptic number.

77648942 is a deficient number, since it is larger than the sum of its proper divisors (57150418).

77648942 is a wasteful number, since it uses less digits than its factorization.

77648942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70295.

The product of its digits is 677376, while the sum is 47.

The square root of 77648942 is about 8811.8637075252. The cubic root of 77648942 is about 426.6238993863.

The spelling of 77648942 in words is "seventy-seven million, six hundred forty-eight thousand, nine hundred forty-two".