84428073 has 6 divisors (see below), whose sum is σ = 121951674. Its totient is φ = 56285376.

The previous prime is 84428053. The next prime is 84428083. The reversal of 84428073 is 37082448.

It can be written as a sum of positive squares in only one way, i.e., 46826649 + 37601424 = 6843^2 + 6132^2 .

It is a de Polignac number, because none of the positive numbers 2^k-84428073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84428053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4690440 + ... + 4690457.

It is an arithmetic number, because the mean of its divisors is an integer number (20325279).

Almost surely, 2^84428073 is an apocalyptic number.

It is an amenable number.

84428073 is a deficient number, since it is larger than the sum of its proper divisors (37523601).

84428073 is a wasteful number, since it uses less digits than its factorization.

84428073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9380903 (or 9380900 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 84428073 is about 9188.4750094888. The cubic root of 84428073 is about 438.6946037640.

The spelling of 84428073 in words is "eighty-four million, four hundred twenty-eight thousand, seventy-three".