84215430 has 64 divisors (see below), whose sum is σ = 241859520. Its totient is φ = 20729088.

The previous prime is 84215413. The next prime is 84215431. The reversal of 84215430 is 3451248.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 84215394 and 84215403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84215431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8487 + ... + 15506.

It is an arithmetic number, because the mean of its divisors is an integer number (3779055).

Almost surely, 2^84215430 is an apocalyptic number.

84215430 is an abundant number, since it is smaller than the sum of its proper divisors (157644090).

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

84215430 is a wasteful number, since it uses less digits than its factorization.

84215430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24022 (or 24016 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 84215430 is about 9176.8965342320. The cubic root of 84215430 is about 438.3259911287.

Adding to 84215430 its reverse (3451248), we get a palindrome (87666678).

The spelling of 84215430 in words is "eighty-four million, two hundred fifteen thousand, four hundred thirty".