84171690 has 32 divisors (see below), whose sum is σ = 224458560. Its totient is φ = 22445712.

The previous prime is 84171679. The next prime is 84171719. The reversal of 84171690 is 9617148.

It is a super-2 number, since 2×84171690² = 14169746794912200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155604 + ... + 156143.

It is an arithmetic number, because the mean of its divisors is an integer number (7014330).

Almost surely, 2^84171690 is an apocalyptic number.

84171690 is an abundant number, since it is smaller than the sum of its proper divisors (140286870).

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

84171690 is a wasteful number, since it uses less digits than its factorization.

84171690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311763 (or 311757 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 84171690 is about 9174.5130660978. The cubic root of 84171690 is about 438.2500917396.

The spelling of 84171690 in words is "eighty-four million, one hundred seventy-one thousand, six hundred ninety".