84547540 has 216 divisors, whose sum is σ = 244532736. Its totient is φ = 24393600.

The previous prime is 84547481. The next prime is 84547543. The reversal of 84547540 is 4574548.

It is a self number, because there is not a number n which added to its sum of digits gives 84547540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84547543) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2727325 + ... + 2727355.

It is an arithmetic number, because the mean of its divisors is an integer number (1132096).

Almost surely, 2^84547540 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 84547540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122266368).

84547540 is an abundant number, since it is smaller than the sum of its proper divisors (159985196).

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

84547540 is a wasteful number, since it uses less digits than its factorization.

84547540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 37.

The square root of 84547540 is about 9194.9736269334. The cubic root of 84547540 is about 438.9014260752.

The spelling of 84547540 in words is "eighty-four million, five hundred forty-seven thousand, five hundred forty".