286744989 has 4 divisors (see below), whose sum is σ = 382326656. Its totient is φ = 191163324.

The previous prime is 286744981. The next prime is 286745003. The reversal of 286744989 is 989447682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 286744989 - 2³ = 286744981 is a prime.

It is a super-2 number, since 2×286744989² = 164445377433220242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (286744981) 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, 47790829 + ... + 47790834.

It is an arithmetic number, because the mean of its divisors is an integer number (95581664).

Almost surely, 2^286744989 is an apocalyptic number.

It is an amenable number.

286744989 is a deficient number, since it is larger than the sum of its proper divisors (95581667).

286744989 is an equidigital number, since it uses as much as digits as its factorization.

286744989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95581666.

The product of its digits is 6967296, while the sum is 57.

The square root of 286744989 is about 16933.5462617846. The cubic root of 286744989 is about 659.4248041834.

The spelling of 286744989 in words is "two hundred eighty-six million, seven hundred forty-four thousand, nine hundred eighty-nine".