287902242 has 32 divisors (see below), whose sum is σ = 677419200. Its totient is φ = 90321984.

The previous prime is 287902229. The next prime is 287902261. The reversal of 287902242 is 242209782.

It is a happy number.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 287902197 and 287902206.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155892 + ... + 157727.

It is an arithmetic number, because the mean of its divisors is an integer number (21169350).

Almost surely, 2^287902242 is an apocalyptic number.

287902242 is an abundant number, since it is smaller than the sum of its proper divisors (389516958).

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

287902242 is a wasteful number, since it uses less digits than its factorization.

287902242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313647 (or 313641 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 287902242 is about 16967.6822813253. The cubic root of 287902242 is about 660.3107214611.

The spelling of 287902242 in words is "two hundred eighty-seven million, nine hundred two thousand, two hundred forty-two".