840157494 has 32 divisors (see below), whose sum is σ = 1834994304. Its totient is φ = 254326080.

The previous prime is 840157489. The next prime is 840157499. The reversal of 840157494 is 494751048.

It is an interprime number because it is at equal distance from previous prime (840157489) and next prime (840157499).

It is a super-2 number, since 2×840157494² = 1411729229448720072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840157499) 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, 62017 + ... + 74339.

It is an arithmetic number, because the mean of its divisors is an integer number (57343572).

Almost surely, 2^840157494 is an apocalyptic number.

840157494 is an abundant number, since it is smaller than the sum of its proper divisors (994836810).

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

840157494 is a wasteful number, since it uses less digits than its factorization.

840157494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13372.

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 840157494 is about 28985.4703946650. The cubic root of 840157494 is about 943.5977613065.

The spelling of 840157494 in words is "eight hundred forty million, one hundred fifty-seven thousand, four hundred ninety-four".