840889960 has 16 divisors (see below), whose sum is σ = 1892002500. Its totient is φ = 336355968.

The previous prime is 840889957. The next prime is 840889963. The reversal of 840889960 is 69988048.

It is an interprime number because it is at equal distance from previous prime (840889957) and next prime (840889963).

It can be written as a sum of positive squares in 2 ways, for example, as 729756196 + 111133764 = 27014^2 + 10542^2 .

It is a junction number, because it is equal to n+sod(n) for n = 840889898 and 840889907.

It is not an unprimeable number, because it can be changed into a prime (840889963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10511085 + ... + 10511164.

Almost surely, 2^840889960 is an apocalyptic number.

It is an amenable number.

840889960 is an abundant number, since it is smaller than the sum of its proper divisors (1051112540).

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

840889960 is a wasteful number, since it uses less digits than its factorization.

840889960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21022260 (or 21022256 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 52.

The square root of 840889960 is about 28998.1026965559. The cubic root of 840889960 is about 943.8718974164.

The spelling of 840889960 in words is "eight hundred forty million, eight hundred eighty-nine thousand, nine hundred sixty".