287472242 has 18 divisors (see below), whose sum is σ = 455820399. Its totient is φ = 135955260.

The previous prime is 287472221. The next prime is 287472281. The reversal of 287472242 is 242274782.

It can be written as a sum of positive squares in only one way, i.e., 143736121 + 143736121 = 11989^2 + 11989^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=11989.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 287472196 and 287472205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 455267 + ... + 455897.

Almost surely, 2^287472242 is an apocalyptic number.

287472242 is a deficient number, since it is larger than the sum of its proper divisors (168348157).

287472242 is an frugal number, since it uses more digits than its factorization.

287472242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302 (or 652 counting only the distinct ones).

The product of its digits is 100352, while the sum is 38.

The square root of 287472242 is about 16955.0063992910. The cubic root of 287472242 is about 659.9818192115.

Multiplying 287472242 by its product of digits (100352), we get a square (28848414429184 = 5371072²).

The spelling of 287472242 in words is "two hundred eighty-seven million, four hundred seventy-two thousand, two hundred forty-two".