285740286 has 16 divisors (see below), whose sum is σ = 615440784. Its totient is φ = 87920064.

The previous prime is 285740227. The next prime is 285740291. The reversal of 285740286 is 682047582.

It is a happy number.

It is a super-2 number, since 2×285740286² = 163295022086723592, which contains 22 as substring.

It is a congruent number.

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, 1831591 + ... + 1831746.

It is an arithmetic number, because the mean of its divisors is an integer number (38465049).

Almost surely, 2^285740286 is an apocalyptic number.

285740286 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

285740286 is an abundant number, since it is smaller than the sum of its proper divisors (329700498).

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

285740286 is a wasteful number, since it uses less digits than its factorization.

285740286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3663355.

The product of its (nonzero) digits is 215040, while the sum is 42.

The square root of 285740286 is about 16903.8541758973. The cubic root of 285740286 is about 658.6537341792.

The spelling of 285740286 in words is "two hundred eighty-five million, seven hundred forty thousand, two hundred eighty-six".