840889692 has 18 divisors (see below), whose sum is σ = 2125582368. Its totient is φ = 280296552.

The previous prime is 840889681. The next prime is 840889727. The reversal of 840889692 is 296988048.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×840889692² = 1414190948223709728, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11678988 + ... + 11679059.

Almost surely, 2^840889692 is an apocalyptic number.

It is an amenable number.

840889692 is an abundant number, since it is smaller than the sum of its proper divisors (1284692676).

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

840889692 is a wasteful number, since it uses less digits than its factorization.

840889692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23358057 (or 23358052 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The square root of 840889692 is about 28998.0980755635. The cubic root of 840889692 is about 943.8717971426.

The spelling of 840889692 in words is "eight hundred forty million, eight hundred eighty-nine thousand, six hundred ninety-two".