287972842 has 8 divisors (see below), whose sum is σ = 446854500. Its totient is φ = 139021344.

The previous prime is 287972821. The next prime is 287972863. The reversal of 287972842 is 248279782.

It is an interprime number because it is at equal distance from previous prime (287972821) and next prime (287972863).

It can be written as a sum of positive squares in 2 ways, for example, as 285981921 + 1990921 = 16911^2 + 1411^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2482467 + ... + 2482582.

Almost surely, 2^287972842 is an apocalyptic number.

287972842 is a deficient number, since it is larger than the sum of its proper divisors (158881658).

287972842 is a wasteful number, since it uses less digits than its factorization.

287972842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4965080.

The product of its digits is 903168, while the sum is 49.

The square root of 287972842 is about 16969.7625793645. The cubic root of 287972842 is about 660.3646913162.

The spelling of 287972842 in words is "two hundred eighty-seven million, nine hundred seventy-two thousand, eight hundred forty-two".