286693640 has 32 divisors (see below), whose sum is σ = 646289280. Its totient is φ = 114459072.

The previous prime is 286693637. The next prime is 286693657. The reversal of 286693640 is 46396682.

It is a junction number, because it is equal to n+sod(n) for n = 286693591 and 286693600.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15329 + ... + 28431.

It is an arithmetic number, because the mean of its divisors is an integer number (20196540).

Almost surely, 2^286693640 is an apocalyptic number.

286693640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

286693640 is an abundant number, since it is smaller than the sum of its proper divisors (359595640).

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

286693640 is a wasteful number, since it uses less digits than its factorization.

286693640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13661 (or 13657 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 44.

The square root of 286693640 is about 16932.0300023358. The cubic root of 286693640 is about 659.3854395598.

The spelling of 286693640 in words is "two hundred eighty-six million, six hundred ninety-three thousand, six hundred forty".