77136390 has 96 divisors (see below), whose sum is σ = 214156800. Its totient is φ = 19206720.

The previous prime is 77136383. The next prime is 77136403. The reversal of 77136390 is 9363177.

77136390 is a `hidden beast` number, since 7 + 7 + 13 + 639 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 134805 + ... + 135375.

It is an arithmetic number, because the mean of its divisors is an integer number (2230800).

Almost surely, 2^77136390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77136390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107078400).

77136390 is an abundant number, since it is smaller than the sum of its proper divisors (137020410).

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

77136390 is a wasteful number, since it uses less digits than its factorization.

77136390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682 (or 679 counting only the distinct ones).

The product of its (nonzero) digits is 23814, while the sum is 36.

The square root of 77136390 is about 8782.7324905180. The cubic root of 77136390 is about 425.6831274477.

The spelling of 77136390 in words is "seventy-seven million, one hundred thirty-six thousand, three hundred ninety".