840313494 has 64 divisors (see below), whose sum is σ = 1971744000. Its totient is φ = 264539520.

The previous prime is 840313493. The next prime is 840313499. The reversal of 840313494 is 494313048.

It is a super-2 number, since 2×840313494² = 1412253536396976072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840313493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 387774 + ... + 389934.

It is an arithmetic number, because the mean of its divisors is an integer number (30808500).

Almost surely, 2^840313494 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 840313494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (985872000).

840313494 is an abundant number, since it is smaller than the sum of its proper divisors (1131430506).

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

840313494 is a wasteful number, since it uses less digits than its factorization.

840313494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2570 (or 2564 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 840313494 is about 28988.1612731819. The cubic root of 840313494 is about 943.6561599369.

The spelling of 840313494 in words is "eight hundred forty million, three hundred thirteen thousand, four hundred ninety-four".