80443840 has 28 divisors (see below), whose sum is σ = 191557656. Its totient is φ = 32177408.

The previous prime is 80443829. The next prime is 80443861. The reversal of 80443840 is 4834408.

It is a super-2 number, since 2×80443840² = 12942422787891200, which contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 125374 + ... + 126013.

Almost surely, 2^80443840 is an apocalyptic number.

80443840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80443840 is an abundant number, since it is smaller than the sum of its proper divisors (111113816).

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

80443840 is a wasteful number, since it uses less digits than its factorization.

80443840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251404 (or 251394 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 80443840 is about 8969.0490019845. The cubic root of 80443840 is about 431.6823224612.

It can be divided in two parts, 804 and 43840, that added together give a palindrome (44644).

The spelling of 80443840 in words is "eighty million, four hundred forty-three thousand, eight hundred forty".