840624985 has 16 divisors (see below), whose sum is σ = 1042255872. Its totient is φ = 650203200.

The previous prime is 840624977. The next prime is 840625007. The reversal of 840624985 is 589426048.

It is not a de Polignac number, because 840624985 - 2³ = 840624977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241155 + ... + 244615.

It is an arithmetic number, because the mean of its divisors is an integer number (65140992).

Almost surely, 2^840624985 is an apocalyptic number.

It is an amenable number.

840624985 is a deficient number, since it is larger than the sum of its proper divisors (201630887).

840624985 is a wasteful number, since it uses less digits than its factorization.

840624985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5064.

The product of its (nonzero) digits is 552960, while the sum is 46.

The square root of 840624985 is about 28993.5335031796. The cubic root of 840624985 is about 943.7727450332.

The spelling of 840624985 in words is "eight hundred forty million, six hundred twenty-four thousand, nine hundred eighty-five".