87745287 has 32 divisors (see below), whose sum is σ = 143769600. Its totient is φ = 46480608.

The previous prime is 87745223. The next prime is 87745297. The reversal of 87745287 is 78254778.

It is a happy number.

It is not a de Polignac number, because 87745287 - 2⁶ = 87745223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87745297) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16414 + ... + 21092.

It is an arithmetic number, because the mean of its divisors is an integer number (4492800).

Almost surely, 2^87745287 is an apocalyptic number.

87745287 is a deficient number, since it is larger than the sum of its proper divisors (56024313).

87745287 is a wasteful number, since it uses less digits than its factorization.

87745287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4755.

The product of its digits is 878080, while the sum is 48.

The square root of 87745287 is about 9367.2454328901. The cubic root of 87745287 is about 444.3664544241.

It can be divided in two parts, 877 and 45287, that added together give a palindrome (46164).

The spelling of 87745287 in words is "eighty-seven million, seven hundred forty-five thousand, two hundred eighty-seven".