77717142 has 24 divisors (see below), whose sum is σ = 169718016. Its totient is φ = 25700976.

The previous prime is 77717141. The next prime is 77717173. The reversal of 77717142 is 24171777.

It is a junction number, because it is equal to n+sod(n) for n = 77717097 and 77717106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77717141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14713 + ... + 19284.

It is an arithmetic number, because the mean of its divisors is an integer number (7071584).

Almost surely, 2^77717142 is an apocalyptic number.

77717142 is an abundant number, since it is smaller than the sum of its proper divisors (92000874).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77717142 is a wasteful number, since it uses less digits than its factorization.

77717142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34132 (or 34129 counting only the distinct ones).

The product of its digits is 19208, while the sum is 36.

The square root of 77717142 is about 8815.7326411365. The cubic root of 77717142 is about 426.7487658041.

The spelling of 77717142 in words is "seventy-seven million, seven hundred seventeen thousand, one hundred forty-two".