84219290 has 8 divisors (see below), whose sum is σ = 151594740. Its totient is φ = 33687712.

The previous prime is 84219287. The next prime is 84219299. The reversal of 84219290 is 9291248.

It can be written as a sum of positive squares in 2 ways, for example, as 80874049 + 3345241 = 8993^2 + 1829^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 84219290.

It is not an unprimeable number, because it can be changed into a prime (84219299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4210955 + ... + 4210974.

Almost surely, 2^84219290 is an apocalyptic number.

84219290 is a deficient number, since it is larger than the sum of its proper divisors (67375450).

84219290 is a wasteful number, since it uses less digits than its factorization.

84219290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8421936.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 84219290 is about 9177.1068425730. The cubic root of 84219290 is about 438.3326878923.

The spelling of 84219290 in words is "eighty-four million, two hundred nineteen thousand, two hundred ninety".