80823690 has 64 divisors (see below), whose sum is σ = 216328320. Its totient is φ = 21473280.

The previous prime is 80823683. The next prime is 80823707. The reversal of 80823690 is 9632808.

It is a super-2 number, since 2×80823690² = 13064937730432200, which contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 125770 + ... + 126410.

It is an arithmetic number, because the mean of its divisors is an integer number (3380130).

Almost surely, 2^80823690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80823690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108164160).

80823690 is an abundant number, since it is smaller than the sum of its proper divisors (135504630).

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

80823690 is a wasteful number, since it uses less digits than its factorization.

80823690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124 (or 1118 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 80823690 is about 8990.1996640787. The cubic root of 80823690 is about 432.3607133865.

The spelling of 80823690 in words is "eighty million, eight hundred twenty-three thousand, six hundred ninety".