842390136 has 96 divisors (see below), whose sum is σ = 2618179200. Its totient is φ = 239688000.

The previous prime is 842390119. The next prime is 842390149. The reversal of 842390136 is 631093248.

It is a super-3 number, since 3×842390136³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 842390136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123175 + ... + 129833.

It is an arithmetic number, because the mean of its divisors is an integer number (27272700).

Almost surely, 2^842390136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 842390136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1309089600).

842390136 is an abundant number, since it is smaller than the sum of its proper divisors (1775789064).

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

842390136 is a wasteful number, since it uses less digits than its factorization.

842390136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6929 (or 6922 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 842390136 is about 29023.9579657910. The cubic root of 842390136 is about 944.4328637022.

The spelling of 842390136 in words is "eight hundred forty-two million, three hundred ninety thousand, one hundred thirty-six".