815940342 has 24 divisors (see below), whose sum is σ = 2020424016. Its totient is φ = 233125776.

The previous prime is 815940299. The next prime is 815940379. The reversal of 815940342 is 243049518.

It is a junction number, because it is equal to n+sod(n) for n = 815940297 and 815940306.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 3237733 + ... + 3237984.

It is an arithmetic number, because the mean of its divisors is an integer number (84184334).

Almost surely, 2^815940342 is an apocalyptic number.

815940342 is an abundant number, since it is smaller than the sum of its proper divisors (1204483674).

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

815940342 is a wasteful number, since it uses less digits than its factorization.

815940342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6475732 (or 6475729 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 815940342 is about 28564.6694712192. The cubic root of 815940342 is about 934.4429720942.

The spelling of 815940342 in words is "eight hundred fifteen million, nine hundred forty thousand, three hundred forty-two".