80699724 has 36 divisors (see below), whose sum is σ = 233133264. Its totient is φ = 23056992.

The previous prime is 80699711. The next prime is 80699743. The reversal of 80699724 is 42799608.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 80699724.

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 11 ways as a sum of consecutive naturals, for example, 159867 + ... + 160370.

It is an arithmetic number, because the mean of its divisors is an integer number (6475924).

Almost surely, 2^80699724 is an apocalyptic number.

80699724 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

80699724 is an abundant number, since it is smaller than the sum of its proper divisors (152433540).

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

80699724 is a wasteful number, since it uses less digits than its factorization.

80699724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320254 (or 320249 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 80699724 is about 8983.3025107696. The cubic root of 80699724 is about 432.1395511087.

The spelling of 80699724 in words is "eighty million, six hundred ninety-nine thousand, seven hundred twenty-four".