87523240 has 32 divisors (see below), whose sum is σ = 225060480. Its totient is φ = 30007872.

The previous prime is 87523229. The next prime is 87523243. The reversal of 87523240 is 4232578.

It is not an unprimeable number, because it can be changed into a prime (87523243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156012 + ... + 156571.

It is an arithmetic number, because the mean of its divisors is an integer number (7033140).

Almost surely, 2^87523240 is an apocalyptic number.

It is an amenable number.

87523240 is an abundant number, since it is smaller than the sum of its proper divisors (137537240).

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

87523240 is a wasteful number, since it uses less digits than its factorization.

87523240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312601 (or 312597 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 87523240 is about 9355.3856147141. The cubic root of 87523240 is about 443.9913019425.

The spelling of 87523240 in words is "eighty-seven million, five hundred twenty-three thousand, two hundred forty".