286720249 has 8 divisors (see below), whose sum is σ = 306373320. Its totient is φ = 267376896.

The previous prime is 286720237. The next prime is 286720261. The reversal of 286720249 is 942027682.

It is an interprime number because it is at equal distance from previous prime (286720237) and next prime (286720261).

It can be written as a sum of positive squares in 4 ways, for example, as 93315600 + 193404649 = 9660^2 + 13907^2 .

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 286720249 - 2⁷ = 286720121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (286720229) 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, 75514 + ... + 79219.

It is an arithmetic number, because the mean of its divisors is an integer number (38296665).

Almost surely, 2^286720249 is an apocalyptic number.

It is an amenable number.

286720249 is a deficient number, since it is larger than the sum of its proper divisors (19653071).

286720249 is a wasteful number, since it uses less digits than its factorization.

286720249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154859.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 286720249 is about 16932.8157434019. The cubic root of 286720249 is about 659.4058388547.

The spelling of 286720249 in words is "two hundred eighty-six million, seven hundred twenty thousand, two hundred forty-nine".