83421450 has 144 divisors (see below), whose sum is σ = 260447616. Its totient is φ = 18748800.

The previous prime is 83421449. The next prime is 83421469. The reversal of 83421450 is 5412438.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 223464 + ... + 223836.

It is an arithmetic number, because the mean of its divisors is an integer number (1808664).

Almost surely, 2^83421450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83421450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130223808).

83421450 is an abundant number, since it is smaller than the sum of its proper divisors (177026166).

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

83421450 is a wasteful number, since it uses less digits than its factorization.

83421450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469 (or 461 counting only the distinct ones).

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

The square root of 83421450 is about 9133.5343651842. The cubic root of 83421450 is about 436.9441321336.

Adding to 83421450 its reverse (5412438), we get a palindrome (88833888).

The spelling of 83421450 in words is "eighty-three million, four hundred twenty-one thousand, four hundred fifty".