840992645 has 8 divisors (see below), whose sum is σ = 1041745920. Its totient is φ = 651090960.

The previous prime is 840992627. The next prime is 840992681. The reversal of 840992645 is 546299048.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 840992645 - 2¹² = 840988549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 840992645.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2712725 + ... + 2713034.

It is an arithmetic number, because the mean of its divisors is an integer number (130218240).

Almost surely, 2^840992645 is an apocalyptic number.

It is an amenable number.

840992645 is a deficient number, since it is larger than the sum of its proper divisors (200753275).

840992645 is a wasteful number, since it uses less digits than its factorization.

840992645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5425795.

The product of its (nonzero) digits is 622080, while the sum is 47.

The square root of 840992645 is about 28999.8731893779. The cubic root of 840992645 is about 943.9103160544.

The spelling of 840992645 in words is "eight hundred forty million, nine hundred ninety-two thousand, six hundred forty-five".