769418136 has 128 divisors (see below), whose sum is σ = 2204294400. Its totient is φ = 248520960.

The previous prime is 769418123. The next prime is 769418141. The reversal of 769418136 is 631814967.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 769418091 and 769418100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2506095 + ... + 2506401.

It is an arithmetic number, because the mean of its divisors is an integer number (17221050).

Almost surely, 2^769418136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 769418136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1102147200).

769418136 is an abundant number, since it is smaller than the sum of its proper divisors (1434876264).

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

769418136 is a wasteful number, since it uses less digits than its factorization.

769418136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646 (or 636 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 769418136 is about 27738.3874080668. The cubic root of 769418136 is about 916.3347142877.

The spelling of 769418136 in words is "seven hundred sixty-nine million, four hundred eighteen thousand, one hundred thirty-six".