287399242 has 8 divisors (see below), whose sum is σ = 464260356. Its totient is φ = 132645792.

The previous prime is 287399201. The next prime is 287399249. The reversal of 287399242 is 242993782.

It can be written as a sum of positive squares in 2 ways, for example, as 286591041 + 808201 = 16929^2 + 899^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 287399192 and 287399201.

It is not an unprimeable number, because it can be changed into a prime (287399249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5526883 + ... + 5526934.

Almost surely, 2^287399242 is an apocalyptic number.

287399242 is a deficient number, since it is larger than the sum of its proper divisors (176861114).

287399242 is a wasteful number, since it uses less digits than its factorization.

287399242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11053832.

The product of its digits is 435456, while the sum is 46.

The square root of 287399242 is about 16952.8535061210. The cubic root of 287399242 is about 659.9259497576.

The spelling of 287399242 in words is "two hundred eighty-seven million, three hundred ninety-nine thousand, two hundred forty-two".