840812898 has 32 divisors (see below), whose sum is σ = 1722746880. Its totient is φ = 273490560.

The previous prime is 840812897. The next prime is 840812963. The reversal of 840812898 is 898218048.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (840812893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37438 + ... + 55526.

It is an arithmetic number, because the mean of its divisors is an integer number (53835840).

Almost surely, 2^840812898 is an apocalyptic number.

840812898 is an abundant number, since it is smaller than the sum of its proper divisors (881933982).

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

840812898 is a wasteful number, since it uses less digits than its factorization.

840812898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18282.

The product of its (nonzero) digits is 294912, while the sum is 48.

The square root of 840812898 is about 28996.7739240075. The cubic root of 840812898 is about 943.8430633312.

The spelling of 840812898 in words is "eight hundred forty million, eight hundred twelve thousand, eight hundred ninety-eight".