84857528628 has 36 divisors (see below), whose sum is σ = 217216184640. Its totient is φ = 27927793296.

The previous prime is 84857528621. The next prime is 84857528663. The reversal of 84857528628 is 82682575848.

84857528628 is a `hidden beast` number, since 8 + 4 + 85 + 7 + 528 + 6 + 28 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84857528621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14915850 + ... + 14921537.

Almost surely, 2^84857528628 is an apocalyptic number.

It is an amenable number.

84857528628 is an abundant number, since it is smaller than the sum of its proper divisors (132358656012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

84857528628 is a wasteful number, since it uses less digits than its factorization.

84857528628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29837476 (or 29837471 counting only the distinct ones).

The product of its digits is 68812800, while the sum is 63.

The spelling of 84857528628 in words is "eighty-four billion, eight hundred fifty-seven million, five hundred twenty-eight thousand, six hundred twenty-eight".