84423015 has 24 divisors (see below), whose sum is σ = 148522608. Its totient is φ = 44352000.

The previous prime is 84422993. The next prime is 84423019. The reversal of 84423015 is 51032448.

It is not a de Polignac number, because 84423015 - 2⁵ = 84422983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84423015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84423019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10986 + ... + 17015.

It is an arithmetic number, because the mean of its divisors is an integer number (6188442).

Almost surely, 2^84423015 is an apocalyptic number.

84423015 is a deficient number, since it is larger than the sum of its proper divisors (64099593).

84423015 is a wasteful number, since it uses less digits than its factorization.

84423015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28079 (or 28076 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 84423015 is about 9188.1997692693. The cubic root of 84423015 is about 438.6858430065.

The spelling of 84423015 in words is "eighty-four million, four hundred twenty-three thousand, fifteen".