80499440 has 80 divisors (see below), whose sum is σ = 218938368. Its totient is φ = 26949888.

The previous prime is 80499431. The next prime is 80499469. The reversal of 80499440 is 4499408.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 80499394 and 80499403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22409 + ... + 25751.

Almost surely, 2^80499440 is an apocalyptic number.

80499440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80499440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109469184).

80499440 is an abundant number, since it is smaller than the sum of its proper divisors (138438928).

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

80499440 is a wasteful number, since it uses less digits than its factorization.

80499440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3406 (or 3400 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 80499440 is about 8972.1480148290. The cubic root of 80499440 is about 431.7817541872.

The spelling of 80499440 in words is "eighty million, four hundred ninety-nine thousand, four hundred forty".