80749990 has 8 divisors (see below), whose sum is σ = 145350000. Its totient is φ = 32299992.

The previous prime is 80749979. The next prime is 80749993. The reversal of 80749990 is 9994708.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 80749990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80749993) 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 3 ways as a sum of consecutive naturals, for example, 4037490 + ... + 4037509.

It is an arithmetic number, because the mean of its divisors is an integer number (18168750).

Almost surely, 2^80749990 is an apocalyptic number.

80749990 is a deficient number, since it is larger than the sum of its proper divisors (64600010).

80749990 is a wasteful number, since it uses less digits than its factorization.

80749990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8075006.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 80749990 is about 8986.0998213908. The cubic root of 80749990 is about 432.2292557451.

The spelling of 80749990 in words is "eighty million, seven hundred forty-nine thousand, nine hundred ninety".