84185420 has 24 divisors (see below), whose sum is σ = 192861648. Its totient is φ = 30612800.

The previous prime is 84185417. The next prime is 84185449. The reversal of 84185420 is 2458148.

It is a happy number.

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, 191111 + ... + 191550.

It is an arithmetic number, because the mean of its divisors is an integer number (8035902).

Almost surely, 2^84185420 is an apocalyptic number.

It is an amenable number.

84185420 is an abundant number, since it is smaller than the sum of its proper divisors (108676228).

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

84185420 is a wasteful number, since it uses less digits than its factorization.

84185420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382681 (or 382679 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 84185420 is about 9175.2613041809. The cubic root of 84185420 is about 438.2739194130.

The spelling of 84185420 in words is "eighty-four million, one hundred eighty-five thousand, four hundred twenty".