84020740 has 24 divisors (see below), whose sum is σ = 176648472. Its totient is φ = 33569280.

The previous prime is 84020731. The next prime is 84020773. The reversal of 84020740 is 4702048.

It can be written as a sum of positive squares in 4 ways, for example, as 5184 + 84015556 = 72^2 + 9166^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20460 + ... + 24220.

It is an arithmetic number, because the mean of its divisors is an integer number (7360353).

Almost surely, 2^84020740 is an apocalyptic number.

It is an amenable number.

84020740 is an abundant number, since it is smaller than the sum of its proper divisors (92627732).

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

84020740 is a wasteful number, since it uses less digits than its factorization.

84020740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4887 (or 4885 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 84020740 is about 9166.2827798405. The cubic root of 84020740 is about 437.9879551604.

Adding to 84020740 its reverse (4702048), we get a palindrome (88722788).

The spelling of 84020740 in words is "eighty-four million, twenty thousand, seven hundred forty".