77730390 has 24 divisors (see below), whose sum is σ = 202099248. Its totient is φ = 20728080.

The previous prime is 77730379. The next prime is 77730397. The reversal of 77730390 is 9303777.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77730397) 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, 431746 + ... + 431925.

It is an arithmetic number, because the mean of its divisors is an integer number (8420802).

Almost surely, 2^77730390 is an apocalyptic number.

77730390 is an abundant number, since it is smaller than the sum of its proper divisors (124368858).

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

77730390 is a wasteful number, since it uses less digits than its factorization.

77730390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863684 (or 863681 counting only the distinct ones).

The product of its (nonzero) digits is 27783, while the sum is 36.

The square root of 77730390 is about 8816.4839930666. The cubic root of 77730390 is about 426.7730129063.

The spelling of 77730390 in words is "seventy-seven million, seven hundred thirty thousand, three hundred ninety".