285387902 has 4 divisors (see below), whose sum is σ = 428081856. Its totient is φ = 142693950.

The previous prime is 285387899. The next prime is 285387931. The reversal of 285387902 is 209783582.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71346974 + ... + 71346977.

It is an arithmetic number, because the mean of its divisors is an integer number (107020464).

Almost surely, 2^285387902 is an apocalyptic number.

285387902 is a deficient number, since it is larger than the sum of its proper divisors (142693954).

285387902 is a wasteful number, since it uses less digits than its factorization.

285387902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142693953.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 285387902 is about 16893.4277753214. The cubic root of 285387902 is about 658.3828652294.

The spelling of 285387902 in words is "two hundred eighty-five million, three hundred eighty-seven thousand, nine hundred two".