84303440 has 80 divisors (see below), whose sum is σ = 213403008. Its totient is φ = 30786048.

The previous prime is 84303431. The next prime is 84303449. The reversal of 84303440 is 4430348.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (84303431) and next prime (84303449).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84303449) 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 15 ways as a sum of consecutive naturals, for example, 106727 + ... + 107513.

Almost surely, 2^84303440 is an apocalyptic number.

84303440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84303440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106701504).

84303440 is an abundant number, since it is smaller than the sum of its proper divisors (129099568).

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

84303440 is a wasteful number, since it uses less digits than its factorization.

84303440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916 (or 910 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 84303440 is about 9181.6904761596. The cubic root of 84303440 is about 438.4786299814.

Adding to 84303440 its reverse (4430348), we get a palindrome (88733788).

The spelling of 84303440 in words is "eighty-four million, three hundred three thousand, four hundred forty".