285147500 has 60 divisors (see below), whose sum is σ = 680313480. Its totient is φ = 103680000.

The previous prime is 285147479. The next prime is 285147509. The reversal of 285147500 is 5741582.

It is not an unprimeable number, because it can be changed into a prime (285147509) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 22316 + ... + 32684.

It is an arithmetic number, because the mean of its divisors is an integer number (11338558).

Almost surely, 2^285147500 is an apocalyptic number.

285147500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285147500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (340156740).

285147500 is an abundant number, since it is smaller than the sum of its proper divisors (395165980).

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

285147500 is a wasteful number, since it uses less digits than its factorization.

285147500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10404 (or 10387 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 285147500 is about 16886.3110240218. The cubic root of 285147500 is about 658.1979461307.

The spelling of 285147500 in words is "two hundred eighty-five million, one hundred forty-seven thousand, five hundred".