287478269 has 8 divisors (see below), whose sum is σ = 309754872. Its totient is φ = 265224960.

The previous prime is 287478251. The next prime is 287478281. The reversal of 287478269 is 962874782.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13410244 + 274068025 = 3662^2 + 16555^2 .

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

It is not a de Polignac number, because 287478269 - 2⁸ = 287478013 is a prime.

It is a super-2 number, since 2×287478269² = 165287510294472722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 287478269.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287478209) 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, 26489 + ... + 35729.

It is an arithmetic number, because the mean of its divisors is an integer number (38719359).

Almost surely, 2^287478269 is an apocalyptic number.

It is an amenable number.

287478269 is a deficient number, since it is larger than the sum of its proper divisors (22276603).

287478269 is a wasteful number, since it uses less digits than its factorization.

287478269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11647.

The product of its digits is 2709504, while the sum is 53.

The square root of 287478269 is about 16955.1841334738. The cubic root of 287478269 is about 659.9864314627.

The spelling of 287478269 in words is "two hundred eighty-seven million, four hundred seventy-eight thousand, two hundred sixty-nine".