87091224 has 32 divisors (see below), whose sum is σ = 237522240. Its totient is φ = 26391200.

The previous prime is 87091201. The next prime is 87091253. The reversal of 87091224 is 42219078.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164682 + ... + 165209.

It is an arithmetic number, because the mean of its divisors is an integer number (7422570).

Almost surely, 2^87091224 is an apocalyptic number.

It is an amenable number.

87091224 is an abundant number, since it is smaller than the sum of its proper divisors (150431016).

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

87091224 is a wasteful number, since it uses less digits than its factorization.

87091224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329911 (or 329907 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 87091224 is about 9332.2678915685. The cubic root of 87091224 is about 443.2595808243.

The spelling of 87091224 in words is "eighty-seven million, ninety-one thousand, two hundred twenty-four".