87547240 has 32 divisors (see below), whose sum is σ = 214889760. Its totient is φ = 31835200.

The previous prime is 87547237. The next prime is 87547241. The reversal of 87547240 is 4274578.

It is a self number, because there is not a number n which added to its sum of digits gives 87547240.

It is not an unprimeable number, because it can be changed into a prime (87547241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99046 + ... + 99925.

It is an arithmetic number, because the mean of its divisors is an integer number (6715305).

Almost surely, 2^87547240 is an apocalyptic number.

It is an amenable number.

87547240 is an abundant number, since it is smaller than the sum of its proper divisors (127342520).

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

87547240 is a wasteful number, since it uses less digits than its factorization.

87547240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198993 (or 198989 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 87547240 is about 9356.6682104262. The cubic root of 87547240 is about 444.0318809454.

The spelling of 87547240 in words is "eighty-seven million, five hundred forty-seven thousand, two hundred forty".