87534740 has 24 divisors (see below), whose sum is σ = 185722152. Its totient is φ = 34652160.

The previous prime is 87534737. The next prime is 87534743. The reversal of 87534740 is 4743578.

It is an interprime number because it is at equal distance from previous prime (87534737) and next prime (87534743).

It can be written as a sum of positive squares in 4 ways, for example, as 4 + 87534736 = 2^2 + 9356^2 .

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 87534694 and 87534703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87534743) 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, 20621 + ... + 24500.

It is an arithmetic number, because the mean of its divisors is an integer number (7738423).

Almost surely, 2^87534740 is an apocalyptic number.

It is an amenable number.

87534740 is an abundant number, since it is smaller than the sum of its proper divisors (98187412).

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

87534740 is a wasteful number, since it uses less digits than its factorization.

87534740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45227 (or 45225 counting only the distinct ones).

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

The square root of 87534740 is about 9356.0002137666. Note that the first 3 decimals coincide. The cubic root of 87534740 is about 444.0107469736.

The spelling of 87534740 in words is "eighty-seven million, five hundred thirty-four thousand, seven hundred forty".