84428055 has 32 divisors (see below), whose sum is σ = 156625920. Its totient is φ = 43068960.

The previous prime is 84428053. The next prime is 84428083. The reversal of 84428055 is 55082448.

It is not a de Polignac number, because 84428055 - 2¹ = 84428053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84428051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10491 + ... + 16700.

It is an arithmetic number, because the mean of its divisors is an integer number (4894560).

Almost surely, 2^84428055 is an apocalyptic number.

84428055 is a deficient number, since it is larger than the sum of its proper divisors (72197865).

84428055 is a wasteful number, since it uses less digits than its factorization.

84428055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27228 (or 27222 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

The square root of 84428055 is about 9188.4740300008. The cubic root of 84428055 is about 438.6945725876.

The spelling of 84428055 in words is "eighty-four million, four hundred twenty-eight thousand, fifty-five".