87439228 has 12 divisors (see below), whose sum is σ = 162019872. Its totient is φ = 41147840.

The previous prime is 87439199. The next prime is 87439237. The reversal of 87439228 is 82293478.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642868 + ... + 643003.

It is an arithmetic number, because the mean of its divisors is an integer number (13501656).

Almost surely, 2^87439228 is an apocalyptic number.

It is an amenable number.

87439228 is a deficient number, since it is larger than the sum of its proper divisors (74580644).

87439228 is a wasteful number, since it uses less digits than its factorization.

87439228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285892 (or 1285890 counting only the distinct ones).

The product of its digits is 193536, while the sum is 43.

The square root of 87439228 is about 9350.8945026666. The cubic root of 87439228 is about 443.8491966824.

It can be divided in two parts, 8743 and 9228, that added together give a palindrome (17971).

The spelling of 87439228 in words is "eighty-seven million, four hundred thirty-nine thousand, two hundred twenty-eight".