84215000 has 40 divisors (see below), whose sum is σ = 197327460. Its totient is φ = 33684000.

The previous prime is 84214993. The next prime is 84215069. The reversal of 84215000 is 51248.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3422 + ... + 13421.

Almost surely, 2^84215000 is an apocalyptic number.

It is an amenable number.

84215000 is an abundant number, since it is smaller than the sum of its proper divisors (113112460).

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

84215000 is a wasteful number, since it uses less digits than its factorization.

84215000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16869 (or 16850 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 84215000 is about 9176.8731058024. The cubic root of 84215000 is about 438.3252451035.

Adding to 84215000 its reverse (51248), we get a palindrome (84266248).

The spelling of 84215000 in words is "eighty-four million, two hundred fifteen thousand".