84271988 has 24 divisors (see below), whose sum is σ = 151047624. Its totient is φ = 41126400.

The previous prime is 84271939. The next prime is 84272017. The reversal of 84271988 is 88917248.

It can be written as a sum of positive squares in 4 ways, for example, as 4919524 + 79352464 = 2218^2 + 8908^2 .

It is a super-2 number, since 2×84271988² = 14203535922944288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32168 + ... + 34688.

It is an arithmetic number, because the mean of its divisors is an integer number (6293651).

Almost surely, 2^84271988 is an apocalyptic number.

It is an amenable number.

84271988 is a deficient number, since it is larger than the sum of its proper divisors (66775636).

84271988 is a wasteful number, since it uses less digits than its factorization.

84271988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2723 (or 2721 counting only the distinct ones).

The product of its digits is 258048, while the sum is 47.

The square root of 84271988 is about 9179.9775598854. The cubic root of 84271988 is about 438.4240938705.

The spelling of 84271988 in words is "eighty-four million, two hundred seventy-one thousand, nine hundred eighty-eight".