286642939 has 8 divisors (see below), whose sum is σ = 312991920. Its totient is φ = 260342400.

The previous prime is 286642913. The next prime is 286642963. The reversal of 286642939 is 939246682.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 286642939 - 2²⁷ = 152425211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 286642892 and 286642901.

It is not an unprimeable number, because it can be changed into a prime (286642999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 879 + ... + 23959.

It is an arithmetic number, because the mean of its divisors is an integer number (39123990).

Almost surely, 2^286642939 is an apocalyptic number.

286642939 is a deficient number, since it is larger than the sum of its proper divisors (26348981).

286642939 is a wasteful number, since it uses less digits than its factorization.

286642939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24221.

The product of its digits is 1119744, while the sum is 49.

The square root of 286642939 is about 16930.5327441283. The cubic root of 286642939 is about 659.3465670870.

The spelling of 286642939 in words is "two hundred eighty-six million, six hundred forty-two thousand, nine hundred thirty-nine".