84391450 has 144 divisors (see below), whose sum is σ = 197409240. Its totient is φ = 26611200.

The previous prime is 84391403. The next prime is 84391453. The reversal of 84391450 is 5419348.

It can be written as a sum of positive squares in 12 ways, for example, as 7144929 + 77246521 = 2673^2 + 8789^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84391453) by changing a digit.

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, 2280832 + ... + 2280868.

Almost surely, 2^84391450 is an apocalyptic number.

84391450 is an abundant number, since it is smaller than the sum of its proper divisors (113017790).

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

84391450 is a wasteful number, since it uses less digits than its factorization.

84391450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 84391450 is about 9186.4819163813. The cubic root of 84391450 is about 438.6311626378.

It can be divided in two parts, 8439 and 1450, that added together give a palindrome (9889).

The spelling of 84391450 in words is "eighty-four million, three hundred ninety-one thousand, four hundred fifty".