285575940 has 72 divisors (see below), whose sum is σ = 932889048. Its totient is φ = 70295040.

The previous prime is 285575929. The next prime is 285575951. The reversal of 285575940 is 49575582.

285575940 is a `hidden beast` number, since 2 + 8 + 5 + 57 + 594 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (285575929) and next prime (285575951).

It can be written as a sum of positive squares in 4 ways, for example, as 101124 + 285474816 = 318^2 + 16896^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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, 58681 + ... + 63360.

Almost surely, 2^285575940 is an apocalyptic number.

285575940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285575940 is an abundant number, since it is smaller than the sum of its proper divisors (647313108).

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

285575940 is a wasteful number, since it uses less digits than its factorization.

285575940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122069 (or 122064 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 45.

The square root of 285575940 is about 16898.9922776478. The cubic root of 285575940 is about 658.5274331620.

The spelling of 285575940 in words is "two hundred eighty-five million, five hundred seventy-five thousand, nine hundred forty".