287631090 has 96 divisors (see below), whose sum is σ = 764478000. Its totient is φ = 75018240.

The previous prime is 287631083. The next prime is 287631119. The reversal of 287631090 is 90136782.

It can be written as a sum of positive squares in 8 ways, for example, as 57289761 + 230341329 = 7569^2 + 15177^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1193370 + ... + 1193610.

Almost surely, 2^287631090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 287631090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (382239000).

287631090 is an abundant number, since it is smaller than the sum of its proper divisors (476846910).

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

287631090 is a wasteful number, since it uses less digits than its factorization.

287631090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492 (or 489 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 287631090 is about 16959.6901504715. The cubic root of 287631090 is about 660.1033584685.

The spelling of 287631090 in words is "two hundred eighty-seven million, six hundred thirty-one thousand, ninety".