287131422 has 32 divisors (see below), whose sum is σ = 586530720. Its totient is φ = 93674880.

The previous prime is 287131417. The next prime is 287131423. The reversal of 287131422 is 224131782.

It is a self number, because there is not a number n which added to its sum of digits gives 287131422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287131423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171204 + ... + 172872.

It is an arithmetic number, because the mean of its divisors is an integer number (18329085).

Almost surely, 2^287131422 is an apocalyptic number.

287131422 is an abundant number, since it is smaller than the sum of its proper divisors (299399298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

287131422 is a wasteful number, since it uses less digits than its factorization.

287131422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2268.

The product of its digits is 5376, while the sum is 30.

The square root of 287131422 is about 16944.9526998455. The cubic root of 287131422 is about 659.7208966807.

It can be divided in two parts, 28713 and 1422, that added together give a triangular number (30135 = T₂₄₅).

The spelling of 287131422 in words is "two hundred eighty-seven million, one hundred thirty-one thousand, four hundred twenty-two".