840898674 has 96 divisors (see below), whose sum is σ = 2349959040. Its totient is φ = 210873600.

The previous prime is 840898661. The next prime is 840898679. The reversal of 840898674 is 476898048.

It is a super-2 number, since 2×840898674² = 1414221159869916552, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 840898674.

It is not an unprimeable number, because it can be changed into a prime (840898679) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29734 + ... + 50654.

It is an arithmetic number, because the mean of its divisors is an integer number (24478740).

Almost surely, 2^840898674 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 840898674, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1174979520).

840898674 is an abundant number, since it is smaller than the sum of its proper divisors (1509060366).

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

840898674 is a wasteful number, since it uses less digits than its factorization.

840898674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20976 (or 20973 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 54.

The square root of 840898674 is about 28998.2529473760. The cubic root of 840898674 is about 943.8751577999.

The spelling of 840898674 in words is "eight hundred forty million, eight hundred ninety-eight thousand, six hundred seventy-four".