87289242 has 32 divisors (see below), whose sum is σ = 182269440. Its totient is φ = 27836160.

The previous prime is 87289219. The next prime is 87289243. The reversal of 87289242 is 24298278.

It is a super-3 number, since 3×87289242³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 87289194 and 87289203.

It is not an unprimeable number, because it can be changed into a prime (87289243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13918 + ... + 19190.

It is an arithmetic number, because the mean of its divisors is an integer number (5695920).

Almost surely, 2^87289242 is an apocalyptic number.

87289242 is an abundant number, since it is smaller than the sum of its proper divisors (94980198).

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

87289242 is a wasteful number, since it uses less digits than its factorization.

87289242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5398.

The product of its digits is 129024, while the sum is 42.

The square root of 87289242 is about 9342.8711860969. The cubic root of 87289242 is about 443.5952707387.

The spelling of 87289242 in words is "eighty-seven million, two hundred eighty-nine thousand, two hundred forty-two".