77770742 has 24 divisors (see below), whose sum is σ = 136109160. Its totient is φ = 33230400.

The previous prime is 77770741. The next prime is 77770753. The reversal of 77770742 is 24707777.

It is a super-2 number, since 2×77770742² = 12096576622461128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77770742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77770741) 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, 38309 + ... + 40287.

It is an arithmetic number, because the mean of its divisors is an integer number (5671215).

Almost surely, 2^77770742 is an apocalyptic number.

77770742 is a deficient number, since it is larger than the sum of its proper divisors (58338418).

77770742 is a wasteful number, since it uses less digits than its factorization.

77770742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396 (or 2389 counting only the distinct ones).

The product of its (nonzero) digits is 134456, while the sum is 41.

The square root of 77770742 is about 8818.7721367546. The cubic root of 77770742 is about 426.8468500309.

The spelling of 77770742 in words is "seventy-seven million, seven hundred seventy thousand, seven hundred forty-two".