285723730 has 16 divisors (see below), whose sum is σ = 516219480. Its totient is φ = 113863552.

The previous prime is 285723721. The next prime is 285723749. The reversal of 285723730 is 37327582.

It can be written as a sum of positive squares in 4 ways, for example, as 101062809 + 184660921 = 10053^2 + 13589^2 .

It is a super-2 number, since 2×285723730² = 163276099770225800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 285723730.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50419 + ... + 55798.

Almost surely, 2^285723730 is an apocalyptic number.

285723730 is a deficient number, since it is larger than the sum of its proper divisors (230495750).

285723730 is a wasteful number, since it uses less digits than its factorization.

285723730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106493.

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 285723730 is about 16903.3644580007. The cubic root of 285723730 is about 658.6410129747.

The spelling of 285723730 in words is "two hundred eighty-five million, seven hundred twenty-three thousand, seven hundred thirty".