84571138 has 32 divisors (see below), whose sum is σ = 135717120. Its totient is φ = 39441600.

The previous prime is 84571129. The next prime is 84571139. The reversal of 84571138 is 83117548.

84571138 = T₃₉₂ + T₃₉₃ + ... + T₈₂₇.

It is a junction number, because it is equal to n+sod(n) for n = 84571097 and 84571106.

It is not an unprimeable number, because it can be changed into a prime (84571139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 506331 + ... + 506497.

It is an arithmetic number, because the mean of its divisors is an integer number (4241160).

Almost surely, 2^84571138 is an apocalyptic number.

84571138 is a deficient number, since it is larger than the sum of its proper divisors (51145982).

84571138 is a wasteful number, since it uses less digits than its factorization.

84571138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402.

The product of its digits is 26880, while the sum is 37.

The square root of 84571138 is about 9196.2567384779. The cubic root of 84571138 is about 438.9422560919.

The spelling of 84571138 in words is "eighty-four million, five hundred seventy-one thousand, one hundred thirty-eight".