84428117 has 8 divisors (see below), whose sum is σ = 87064992. Its totient is φ = 81810000.

The previous prime is 84428083. The next prime is 84428119. The reversal of 84428117 is 71182448.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84428117 - 2⁶ = 84428053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84428119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4742 + ... + 13832.

It is an arithmetic number, because the mean of its divisors is an integer number (10883124).

Almost surely, 2^84428117 is an apocalyptic number.

It is an amenable number.

84428117 is a deficient number, since it is larger than the sum of its proper divisors (2636875).

84428117 is a wasteful number, since it uses less digits than its factorization.

84428117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9379.

The product of its digits is 14336, while the sum is 35.

The square root of 84428117 is about 9188.4774037922. The cubic root of 84428117 is about 438.6946799731.

The spelling of 84428117 in words is "eighty-four million, four hundred twenty-eight thousand, one hundred seventeen".