87031242 has 24 divisors (see below), whose sum is σ = 189730944. Its totient is φ = 28831464.

The previous prime is 87031199. The next prime is 87031271. The reversal of 87031242 is 24213078.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11898 + ... + 17765.

It is an arithmetic number, because the mean of its divisors is an integer number (7905456).

Almost surely, 2^87031242 is an apocalyptic number.

87031242 is an abundant number, since it is smaller than the sum of its proper divisors (102699702).

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

87031242 is a wasteful number, since it uses less digits than its factorization.

87031242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29834 (or 29831 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 87031242 is about 9329.0536497546. The cubic root of 87031242 is about 443.1577959710.

The spelling of 87031242 in words is "eighty-seven million, thirty-one thousand, two hundred forty-two".