287887122 has 20 divisors (see below), whose sum is σ = 645080766. Its totient is φ = 95962320.

The previous prime is 287887091. The next prime is 287887153. The reversal of 287887122 is 221788782.

It is an interprime number because it is at equal distance from previous prime (287887091) and next prime (287887153).

It can be written as a sum of positive squares in only one way, i.e., 271557441 + 16329681 = 16479^2 + 4041^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 888379 + ... + 888702.

Almost surely, 2^287887122 is an apocalyptic number.

287887122 is an abundant number, since it is smaller than the sum of its proper divisors (357193644).

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

287887122 is a wasteful number, since it uses less digits than its factorization.

287887122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777095 (or 1777086 counting only the distinct ones).

The product of its digits is 200704, while the sum is 45.

The square root of 287887122 is about 16967.2367225780. The cubic root of 287887122 is about 660.2991618974.

It can be divided in two parts, 2878 and 87122, that added together give a square (90000 = 300²).

The spelling of 287887122 in words is "two hundred eighty-seven million, eight hundred eighty-seven thousand, one hundred twenty-two".