285389532 has 18 divisors (see below), whose sum is σ = 721401408. Its totient is φ = 95129832.

The previous prime is 285389509. The next prime is 285389567. The reversal of 285389532 is 235983582.

285389532 is a `hidden beast` number, since 2 + 85 + 38 + 9 + 532 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3963708 + ... + 3963779.

It is an arithmetic number, because the mean of its divisors is an integer number (40077856).

Almost surely, 2^285389532 is an apocalyptic number.

It is an amenable number.

285389532 is an abundant number, since it is smaller than the sum of its proper divisors (436011876).

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

285389532 is a wasteful number, since it uses less digits than its factorization.

285389532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7927497 (or 7927492 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 285389532 is about 16893.4760188660. The cubic root of 285389532 is about 658.3841186836.

The spelling of 285389532 in words is "two hundred eighty-five million, three hundred eighty-nine thousand, five hundred thirty-two".