80999424 has 264 divisors, whose sum is σ = 275902848. Its totient is φ = 22609920.

The previous prime is 80999419. The next prime is 80999431. The reversal of 80999424 is 42499908.

It is a tau number, because it is divible by the number of its divisors (264).

It is a self number, because there is not a number n which added to its sum of digits gives 80999424.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1723369 + ... + 1723415.

Almost surely, 2^80999424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80999424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137951424).

80999424 is an abundant number, since it is smaller than the sum of its proper divisors (194903424).

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

80999424 is a wasteful number, since it uses less digits than its factorization.

80999424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101 (or 80 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 80999424 is about 8999.9679999431. The cubic root of 80999424 is about 432.6738454901.

It can be divided in two parts, 809994 and 24, that added together give a palindrome (810018).

The spelling of 80999424 in words is "eighty million, nine hundred ninety-nine thousand, four hundred twenty-four".