77730774 has 16 divisors (see below), whose sum is σ = 169594560. Its totient is φ = 23554760.

The previous prime is 77730773. The next prime is 77730791. The reversal of 77730774 is 47703777.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77730773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 588804 + ... + 588935.

It is an arithmetic number, because the mean of its divisors is an integer number (10599660).

Almost surely, 2^77730774 is an apocalyptic number.

77730774 is an abundant number, since it is smaller than the sum of its proper divisors (91863786).

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

77730774 is a wasteful number, since it uses less digits than its factorization.

77730774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177755.

The product of its (nonzero) digits is 201684, while the sum is 42.

The square root of 77730774 is about 8816.5057704286. The cubic root of 77730774 is about 426.7737156797.

The spelling of 77730774 in words is "seventy-seven million, seven hundred thirty thousand, seven hundred seventy-four".