840265632 has 72 divisors (see below), whose sum is σ = 2394887040. Its totient is φ = 279457920.

The previous prime is 840265619. The next prime is 840265663. The reversal of 840265632 is 236562048.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134907 + ... + 140997.

It is an arithmetic number, because the mean of its divisors is an integer number (33262320).

Almost surely, 2^840265632 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 840265632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1197443520).

840265632 is an abundant number, since it is smaller than the sum of its proper divisors (1554621408).

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

840265632 is a wasteful number, since it uses less digits than its factorization.

840265632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6586 (or 6575 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 840265632 is about 28987.3357175164. The cubic root of 840265632 is about 943.6382435565.

The spelling of 840265632 in words is "eight hundred forty million, two hundred sixty-five thousand, six hundred thirty-two".