840707136 has 84 divisors (see below), whose sum is σ = 2536596400. Its totient is φ = 265483008.

The previous prime is 840707123. The next prime is 840707143. The reversal of 840707136 is 631707048.

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

It is a self number, because there is not a number n which added to its sum of digits gives 840707136.

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, 27466 + ... + 49353.

Almost surely, 2^840707136 is an apocalyptic number.

It is an amenable number.

840707136 is an abundant number, since it is smaller than the sum of its proper divisors (1695889264).

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

840707136 is a wasteful number, since it uses less digits than its factorization.

840707136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76856 (or 76843 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 840707136 is about 28994.9501810229. The cubic root of 840707136 is about 943.8034877744.

The spelling of 840707136 in words is "eight hundred forty million, seven hundred seven thousand, one hundred thirty-six".