840264 has 32 divisors (see below), whose sum is σ = 2123520. Its totient is φ = 277056.

The previous prime is 840253. The next prime is 840269. The reversal of 840264 is 462048.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 840264.

It is not an unprimeable number, because it can be changed into a prime (840269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3657 + ... + 3879.

It is an arithmetic number, because the mean of its divisors is an integer number (66360).

2⁸⁴⁰²⁶⁴ is an apocalyptic number.

It is an amenable number.

840264 is an abundant number, since it is smaller than the sum of its proper divisors (1283256).

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

840264 is a wasteful number, since it uses less digits than its factorization.

840264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389 (or 385 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 840264 is about 916.6591514843. The cubic root of 840264 is about 94.3637632631.

The spelling of 840264 in words is "eight hundred forty thousand, two hundred sixty-four".