84128356 has 24 divisors (see below), whose sum is σ = 159810560. Its totient is φ = 38519712.

The previous prime is 84128353. The next prime is 84128381. The reversal of 84128356 is 65382148.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (84128353) 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 7 ways as a sum of consecutive naturals, for example, 235 + ... + 12973.

Almost surely, 2^84128356 is an apocalyptic number.

It is an amenable number.

84128356 is a deficient number, since it is larger than the sum of its proper divisors (75682204).

84128356 is a wasteful number, since it uses less digits than its factorization.

84128356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12883 (or 12881 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 84128356 is about 9172.1511108355. The cubic root of 84128356 is about 438.1748709242.

The spelling of 84128356 in words is "eighty-four million, one hundred twenty-eight thousand, three hundred fifty-six".