285796728 has 64 divisors (see below), whose sum is σ = 907296000. Its totient is φ = 81655776.

The previous prime is 285796717. The next prime is 285796729. The reversal of 285796728 is 827697582.

It is a happy number.

285796728 is a `hidden beast` number, since 2 + 8 + 579 + 67 + 2 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285796729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92998 + ... + 96021.

It is an arithmetic number, because the mean of its divisors is an integer number (14176500).

Almost surely, 2^285796728 is an apocalyptic number.

285796728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

285796728 is an abundant number, since it is smaller than the sum of its proper divisors (621499272).

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

285796728 is a wasteful number, since it uses less digits than its factorization.

285796728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189041 (or 189031 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The square root of 285796728 is about 16905.5235943759. The cubic root of 285796728 is about 658.6970990672.

The spelling of 285796728 in words is "two hundred eighty-five million, seven hundred ninety-six thousand, seven hundred twenty-eight".