840916590 has 16 divisors (see below), whose sum is σ = 2018199888. Its totient is φ = 224244416.

The previous prime is 840916561. The next prime is 840916591. The reversal of 840916590 is 95619048.

It is a super-2 number, since 2×840916590² = 1414281422674456200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840916591) 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, 14015247 + ... + 14015306.

It is an arithmetic number, because the mean of its divisors is an integer number (126137493).

Almost surely, 2^840916590 is an apocalyptic number.

840916590 is an abundant number, since it is smaller than the sum of its proper divisors (1177283298).

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

840916590 is a wasteful number, since it uses less digits than its factorization.

840916590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28030563.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 840916590 is about 28998.5618608923. The cubic root of 840916590 is about 943.8818610837.

The spelling of 840916590 in words is "eight hundred forty million, nine hundred sixteen thousand, five hundred ninety".