765396 has 48 divisors (see below), whose sum is σ = 2094400. Its totient is φ = 241056.

The previous prime is 765389. The next prime is 765409. The reversal of 765396 is 693567.

It is a happy number.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

Its product of digits (34020) is a multiple of the sum of its prime factors (405).

It is a self number, because there is not a number n which added to its sum of digits gives 765396.

It is a congruent number.

It is an unprimeable number.

765396 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1866 + ... + 2238.

2⁷⁶⁵³⁹⁶ is an apocalyptic number.

765396 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 765396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1047200).

765396 is an abundant number, since it is smaller than the sum of its proper divisors (1329004).

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

765396 is a wasteful number, since it uses less digits than its factorization.

765396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405 (or 397 counting only the distinct ones).

The product of its digits is 34020, while the sum is 36.

The square root of 765396 is about 874.8691330708. The cubic root of 765396 is about 91.4735209593.

The spelling of 765396 in words is "seven hundred sixty-five thousand, three hundred ninety-six".