80353440 has 144 divisors (see below), whose sum is σ = 281100456. Its totient is φ = 20889600.

The previous prime is 80353439. The next prime is 80353499. The reversal of 80353440 is 4435308.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 29030544 + 51322896 = 5388^2 + 7164^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58360 + ... + 59720.

Almost surely, 2^80353440 is an apocalyptic number.

80353440 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 80353440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140550228).

80353440 is an abundant number, since it is smaller than the sum of its proper divisors (200747016).

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

80353440 is a wasteful number, since it uses less digits than its factorization.

80353440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423 (or 1412 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 80353440 is about 8964.0080321249. The cubic root of 80353440 is about 431.5205586392.

Adding to 80353440 its reverse (4435308), we get a palindrome (84788748).

The spelling of 80353440 in words is "eighty million, three hundred fifty-three thousand, four hundred forty".