77393956 has 24 divisors (see below), whose sum is σ = 137513376. Its totient is φ = 38109120.

The previous prime is 77393951. The next prime is 77393957. The reversal of 77393956 is 65939377.

77393956 = T₁₄₃ + T₁₄₄ + ... + T₇₇₅.

It is not an unprimeable number, because it can be changed into a prime (77393951) by changing a digit.

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, 89880 + ... + 90736.

It is an arithmetic number, because the mean of its divisors is an integer number (5729724).

Almost surely, 2^77393956 is an apocalyptic number.

It is an amenable number.

77393956 is a deficient number, since it is larger than the sum of its proper divisors (60119420).

77393956 is a wasteful number, since it uses less digits than its factorization.

77393956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179 (or 1177 counting only the distinct ones).

The product of its digits is 1071630, while the sum is 49.

The square root of 77393956 is about 8797.3834746474. The cubic root of 77393956 is about 426.1564003595.

The spelling of 77393956 in words is "seventy-seven million, three hundred ninety-three thousand, nine hundred fifty-six".