84905538 has 16 divisors (see below), whose sum is σ = 169975776. Its totient is φ = 28274400.

The previous prime is 84905507. The next prime is 84905551. The reversal of 84905538 is 83550948.

It is a self number, because there is not a number n which added to its sum of digits gives 84905538.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 438 + ... + 13038.

It is an arithmetic number, because the mean of its divisors is an integer number (10623486).

Almost surely, 2^84905538 is an apocalyptic number.

84905538 is an abundant number, since it is smaller than the sum of its proper divisors (85070238).

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

84905538 is a wasteful number, since it uses less digits than its factorization.

84905538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13729.

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 84905538 is about 9214.4201119767. The cubic root of 84905538 is about 439.5200310294.

It can be divided in two parts, 8490 and 5538, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 84905538 in words is "eighty-four million, nine hundred five thousand, five hundred thirty-eight".