287932145 has 12 divisors (see below), whose sum is σ = 367040604. Its totient is φ = 216794880.

The previous prime is 287932133. The next prime is 287932153. The reversal of 287932145 is 541239782.

It can be written as a sum of positive squares in 6 ways, for example, as 5456896 + 282475249 = 2336^2 + 16807^2 .

It is not a de Polignac number, because 287932145 - 2⁴ = 287932129 is a prime.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98186 + ... + 101075.

It is an arithmetic number, because the mean of its divisors is an integer number (30586717).

Almost surely, 2^287932145 is an apocalyptic number.

It is an amenable number.

287932145 is a deficient number, since it is larger than the sum of its proper divisors (79108459).

287932145 is a wasteful number, since it uses less digits than its factorization.

287932145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199300 (or 199283 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 287932145 is about 16968.5634335968. The cubic root of 287932145 is about 660.3335817530. Note that the first 3 decimals are identical.

The spelling of 287932145 in words is "two hundred eighty-seven million, nine hundred thirty-two thousand, one hundred forty-five".