87273240 has 128 divisors (see below), whose sum is σ = 279936000. Its totient is φ = 21690368.

The previous prime is 87273233. The next prime is 87273253. The reversal of 87273240 is 4237278.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 365041 + ... + 365279.

It is an arithmetic number, because the mean of its divisors is an integer number (2187000).

Almost surely, 2^87273240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87273240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139968000).

87273240 is an abundant number, since it is smaller than the sum of its proper divisors (192662760).

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

87273240 is a wasteful number, since it uses less digits than its factorization.

87273240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449 (or 445 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 87273240 is about 9342.0147719858. The cubic root of 87273240 is about 443.5681622231.

The spelling of 87273240 in words is "eighty-seven million, two hundred seventy-three thousand, two hundred forty".