840689088 has 56 divisors (see below), whose sum is σ = 2227478400. Its totient is φ = 279832320.

The previous prime is 840689081. The next prime is 840689089. The reversal of 840689088 is 880986048.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 840689088.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840689081) 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, 153013 + ... + 158411.

It is an arithmetic number, because the mean of its divisors is an integer number (39776400).

Almost surely, 2^840689088 is an apocalyptic number.

It is an amenable number.

840689088 is an abundant number, since it is smaller than the sum of its proper divisors (1386789312).

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

840689088 is a wasteful number, since it uses less digits than its factorization.

840689088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6225 (or 6215 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 51.

The square root of 840689088 is about 28994.6389527444. The cubic root of 840689088 is about 943.7967339809.

The spelling of 840689088 in words is "eight hundred forty million, six hundred eighty-nine thousand, eighty-eight".