285672870 has 96 divisors (see below), whose sum is σ = 852441408. Its totient is φ = 65021184.

The previous prime is 285672853. The next prime is 285672883. The reversal of 285672870 is 78276582.

285672870 is a `hidden beast` number, since 2 + 8 + 567 + 2 + 87 + 0 = 666.

285672870 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 173692 + ... + 175328.

It is an arithmetic number, because the mean of its divisors is an integer number (8879598).

Almost surely, 2^285672870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285672870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (426220704).

285672870 is an abundant number, since it is smaller than the sum of its proper divisors (566768538).

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

285672870 is a wasteful number, since it uses less digits than its factorization.

285672870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1934 (or 1931 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 285672870 is about 16901.8599568213. The cubic root of 285672870 is about 658.6019303852.

The spelling of 285672870 in words is "two hundred eighty-five million, six hundred seventy-two thousand, eight hundred seventy".