87547840 has 56 divisors (see below), whose sum is σ = 212945472. Its totient is φ = 34268160.

The previous prime is 87547741. The next prime is 87547843. The reversal of 87547840 is 4874578.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87547843) 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, 12130 + ... + 17950.

Almost surely, 2^87547840 is an apocalyptic number.

87547840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87547840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106472736).

87547840 is an abundant number, since it is smaller than the sum of its proper divisors (125397632).

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

87547840 is a wasteful number, since it uses less digits than its factorization.

87547840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5885 (or 5875 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 43.

The square root of 87547840 is about 9356.7002730664. The cubic root of 87547840 is about 444.0328953254.

The spelling of 87547840 in words is "eighty-seven million, five hundred forty-seven thousand, eight hundred forty".