815435020 has 12 divisors (see below), whose sum is σ = 1712413584. Its totient is φ = 326174000.

The previous prime is 815435017. The next prime is 815435053. The reversal of 815435020 is 20534518.

It is a self number, because there is not a number n which added to its sum of digits gives 815435020.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20385856 + ... + 20385895.

It is an arithmetic number, because the mean of its divisors is an integer number (142701132).

Almost surely, 2^815435020 is an apocalyptic number.

It is an amenable number.

815435020 is an abundant number, since it is smaller than the sum of its proper divisors (896978564).

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

815435020 is a wasteful number, since it uses less digits than its factorization.

815435020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40771760 (or 40771758 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 815435020 is about 28555.8228738028. The cubic root of 815435020 is about 934.2500282071.

Adding to 815435020 its reverse (20534518), we get a palindrome (835969538).

The spelling of 815435020 in words is "eight hundred fifteen million, four hundred thirty-five thousand, twenty".