77393790 has 48 divisors (see below), whose sum is σ = 202378176. Its totient is φ = 20520000.

The previous prime is 77393761. The next prime is 77393801. The reversal of 77393790 is 9739377.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13915 + ... + 18665.

It is an arithmetic number, because the mean of its divisors is an integer number (4216212).

Almost surely, 2^77393790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77393790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101189088).

77393790 is an abundant number, since it is smaller than the sum of its proper divisors (124984386).

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

77393790 is a wasteful number, since it uses less digits than its factorization.

77393790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4945 (or 4942 counting only the distinct ones).

The product of its (nonzero) digits is 250047, while the sum is 45.

The square root of 77393790 is about 8797.3740400190. The cubic root of 77393790 is about 426.1560956759.

The spelling of 77393790 in words is "seventy-seven million, three hundred ninety-three thousand, seven hundred ninety".