815142072 has 16 divisors (see below), whose sum is σ = 2037855240. Its totient is φ = 271714016.

The previous prime is 815142049. The next prime is 815142073. The reversal of 815142072 is 270241518.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815142073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16982103 + ... + 16982150.

Almost surely, 2^815142072 is an apocalyptic number.

It is an amenable number.

815142072 is an abundant number, since it is smaller than the sum of its proper divisors (1222713168).

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

815142072 is a wasteful number, since it uses less digits than its factorization.

815142072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33964262 (or 33964258 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 815142072 is about 28550.6930213611. The cubic root of 815142072 is about 934.1381372322.

The spelling of 815142072 in words is "eight hundred fifteen million, one hundred forty-two thousand, seventy-two".