84145740 has 72 divisors (see below), whose sum is σ = 274084272. Its totient is φ = 19232640.

The previous prime is 84145729. The next prime is 84145751. The reversal of 84145740 is 4754148.

It is an interprime number because it is at equal distance from previous prime (84145729) and next prime (84145751).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11371 + ... + 17250.

It is an arithmetic number, because the mean of its divisors is an integer number (3806726).

Almost surely, 2^84145740 is an apocalyptic number.

It is an amenable number.

84145740 is an abundant number, since it is smaller than the sum of its proper divisors (189938532).

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

84145740 is a wasteful number, since it uses less digits than its factorization.

84145740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28647 (or 28638 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 33.

The square root of 84145740 is about 9173.0987130849. The cubic root of 84145740 is about 438.2050498385.

Adding to 84145740 its reverse (4754148), we get a palindrome (88899888).

The spelling of 84145740 in words is "eighty-four million, one hundred forty-five thousand, seven hundred forty".