285251900 has 18 divisors (see below), whose sum is σ = 618996840. Its totient is φ = 114100720.

The previous prime is 285251893. The next prime is 285251909. The reversal of 285251900 is 9152582.

It is a super-2 number, since 2×285251900² = 162737292907220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285251909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1426160 + ... + 1426359.

Almost surely, 2^285251900 is an apocalyptic number.

285251900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285251900 is an abundant number, since it is smaller than the sum of its proper divisors (333744940).

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

285251900 is a wasteful number, since it uses less digits than its factorization.

285251900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2852533 (or 2852526 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 285251900 is about 16889.4020024393. The cubic root of 285251900 is about 658.2782641896.

The spelling of 285251900 in words is "two hundred eighty-five million, two hundred fifty-one thousand, nine hundred".