285851972 has 24 divisors (see below), whose sum is σ = 573671616. Its totient is φ = 122086368.

The previous prime is 285851953. The next prime is 285851999. The reversal of 285851972 is 279158582.

It is a super-2 number, since 2×285851972² = 163422699792577568, which contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

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, 9218 + ... + 25625.

It is an arithmetic number, because the mean of its divisors is an integer number (23902984).

Almost surely, 2^285851972 is an apocalyptic number.

It is an amenable number.

285851972 is an abundant number, since it is smaller than the sum of its proper divisors (287819644).

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

285851972 is a wasteful number, since it uses less digits than its factorization.

285851972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35147 (or 35145 counting only the distinct ones).

The product of its digits is 403200, while the sum is 47.

The square root of 285851972 is about 16907.1574192707. The cubic root of 285851972 is about 658.7395379927.

The spelling of 285851972 in words is "two hundred eighty-five million, eight hundred fifty-one thousand, nine hundred seventy-two".