769640 has 32 divisors (see below), whose sum is σ = 1762560. Its totient is φ = 302400.

The previous prime is 769627. The next prime is 769661. The reversal of 769640 is 46967.

It is a junction number, because it is equal to n+sod(n) for n = 769597 and 769606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2705 + ... + 2975.

It is an arithmetic number, because the mean of its divisors is an integer number (55080).

2⁷⁶⁹⁶⁴⁰ 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 769640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (881280).

769640 is an abundant number, since it is smaller than the sum of its proper divisors (992920).

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

769640 is a wasteful number, since it uses less digits than its factorization.

769640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353 (or 349 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 769640 is about 877.2912857199. The cubic root of 769640 is about 91.6422781767.

The spelling of 769640 in words is "seven hundred sixty-nine thousand, six hundred forty".