286894640 has 40 divisors (see below), whose sum is σ = 696035808. Its totient is φ = 109767680.

The previous prime is 286894613. The next prime is 286894679. The reversal of 286894640 is 46498682.

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 76121 + ... + 79800.

Almost surely, 2^286894640 is an apocalyptic number.

286894640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

286894640 is an abundant number, since it is smaller than the sum of its proper divisors (409141168).

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

286894640 is a wasteful number, since it uses less digits than its factorization.

286894640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155957 (or 155951 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 47.

The square root of 286894640 is about 16937.9644585765. The cubic root of 286894640 is about 659.5395012401.

The spelling of 286894640 in words is "two hundred eighty-six million, eight hundred ninety-four thousand, six hundred forty".