87347540 has 48 divisors (see below), whose sum is σ = 212188032. Its totient is φ = 29582976.

The previous prime is 87347521. The next prime is 87347549. The reversal of 87347540 is 4574378.

It is a junction number, because it is equal to n+sod(n) for n = 87347494 and 87347503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87347549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7862 + ... + 15378.

It is an arithmetic number, because the mean of its divisors is an integer number (4420584).

Almost surely, 2^87347540 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 87347540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106094016).

87347540 is an abundant number, since it is smaller than the sum of its proper divisors (124840492).

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

87347540 is a wasteful number, since it uses less digits than its factorization.

87347540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7616 (or 7614 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 38.

The square root of 87347540 is about 9345.9905842024. The cubic root of 87347540 is about 443.6940036463.

The spelling of 87347540 in words is "eighty-seven million, three hundred forty-seven thousand, five hundred forty".