285025540 has 12 divisors (see below), whose sum is σ = 598553676. Its totient is φ = 114010208.

The previous prime is 285025483. The next prime is 285025567. The reversal of 285025540 is 45520582.

It can be written as a sum of positive squares in 2 ways, for example, as 150651076 + 134374464 = 12274^2 + 11592^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7125619 + ... + 7125658.

It is an arithmetic number, because the mean of its divisors is an integer number (49879473).

Almost surely, 2^285025540 is an apocalyptic number.

285025540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285025540 is an abundant number, since it is smaller than the sum of its proper divisors (313528136).

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

285025540 is a wasteful number, since it uses less digits than its factorization.

285025540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14251286 (or 14251284 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 31.

The square root of 285025540 is about 16882.6994287051. The cubic root of 285025540 is about 658.1040938042.

The spelling of 285025540 in words is "two hundred eighty-five million, twenty-five thousand, five hundred forty".