815943492 has 432 divisors, whose sum is σ = 2877638400. Its totient is φ = 193729536.

The previous prime is 815943481. The next prime is 815943493. The reversal of 815943492 is 294349518.

815943492 is a `hidden beast` number, since 8 + 159 + 4 + 3 + 492 = 666.

It is not an unprimeable number, because it can be changed into a prime (815943493) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 35475793 + ... + 35475815.

It is an arithmetic number, because the mean of its divisors is an integer number (6661200).

Almost surely, 2^815943492 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 815943492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1438819200).

815943492 is an abundant number, since it is smaller than the sum of its proper divisors (2061694908).

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

815943492 is a wasteful number, since it uses less digits than its factorization.

815943492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 65 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 815943492 is about 28564.7246092099. The cubic root of 815943492 is about 934.4441745888. Note that the first 3 decimals are identical.

The spelling of 815943492 in words is "eight hundred fifteen million, nine hundred forty-three thousand, four hundred ninety-two".