77061388 has 12 divisors (see below), whose sum is σ = 137727072. Its totient is φ = 37710800.

The previous prime is 77061349. The next prime is 77061401. The reversal of 77061388 is 88316077.

It is a self number, because there is not a number n which added to its sum of digits gives 77061388.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204763 + ... + 205138.

It is an arithmetic number, because the mean of its divisors is an integer number (11477256).

Almost surely, 2^77061388 is an apocalyptic number.

It is an amenable number.

77061388 is a deficient number, since it is larger than the sum of its proper divisors (60665684).

77061388 is a wasteful number, since it uses less digits than its factorization.

77061388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409952 (or 409950 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 77061388 is about 8778.4615964302. The cubic root of 77061388 is about 425.5451145963.

The spelling of 77061388 in words is "seventy-seven million, sixty-one thousand, three hundred eighty-eight".