285123972 has 24 divisors (see below), whose sum is σ = 760330816. Its totient is φ = 81463968.

The previous prime is 285123959. The next prime is 285123977. The reversal of 285123972 is 279321582.

It is a self number, because there is not a number n which added to its sum of digits gives 285123972.

It is not an unprimeable number, because it can be changed into a prime (285123977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1697083 + ... + 1697250.

Almost surely, 2^285123972 is an apocalyptic number.

It is an amenable number.

285123972 is an abundant number, since it is smaller than the sum of its proper divisors (475206844).

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

285123972 is a wasteful number, since it uses less digits than its factorization.

285123972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3394347 (or 3394345 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 285123972 is about 16885.6143506832. The cubic root of 285123972 is about 658.1798426262.

The spelling of 285123972 in words is "two hundred eighty-five million, one hundred twenty-three thousand, nine hundred seventy-two".