84428855 has 16 divisors (see below), whose sum is σ = 115940160. Its totient is φ = 57818112.

The previous prime is 84428849. The next prime is 84428863. The reversal of 84428855 is 55882448.

It is a cyclic number.

It is not a de Polignac number, because 84428855 - 2²² = 80234551 is a prime.

It is a super-2 number, since 2×84428855² = 14256463113222050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43751 + ... + 45639.

It is an arithmetic number, because the mean of its divisors is an integer number (7246260).

Almost surely, 2^84428855 is an apocalyptic number.

84428855 is a deficient number, since it is larger than the sum of its proper divisors (31511305).

84428855 is a wasteful number, since it uses less digits than its factorization.

84428855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3178.

The product of its digits is 409600, while the sum is 44.

The square root of 84428855 is about 9188.5175626975. The cubic root of 84428855 is about 438.6959582034.

The spelling of 84428855 in words is "eighty-four million, four hundred twenty-eight thousand, eight hundred fifty-five".