285731730 has 48 divisors (see below), whose sum is σ = 749870784. Its totient is φ = 75480480.

The previous prime is 285731717. The next prime is 285731791. The reversal of 285731730 is 37137582.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5206 + ... + 24465.

It is an arithmetic number, because the mean of its divisors is an integer number (15622308).

Almost surely, 2^285731730 is an apocalyptic number.

285731730 is an abundant number, since it is smaller than the sum of its proper divisors (464139054).

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

285731730 is a wasteful number, since it uses less digits than its factorization.

285731730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29791 (or 29788 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 285731730 is about 16903.6010956246. The cubic root of 285731730 is about 658.6471600302.

It can be divided in two parts, 28573 and 1730, that added together give a palindrome (30303).

The spelling of 285731730 in words is "two hundred eighty-five million, seven hundred thirty-one thousand, seven hundred thirty".