80005440 has 56 divisors (see below), whose sum is σ = 254020320. Its totient is φ = 21334528.

The previous prime is 80005381. The next prime is 80005441. The reversal of 80005440 is 4450008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80005441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40710 + ... + 42629.

Almost surely, 2^80005440 is an apocalyptic number.

80005440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80005440 is an abundant number, since it is smaller than the sum of its proper divisors (174014880).

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

80005440 is a wasteful number, since it uses less digits than its factorization.

80005440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83359 (or 83349 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 80005440 is about 8944.5760100745. The cubic root of 80005440 is about 430.8967045556.

Adding to 80005440 its reverse (4450008), we get a palindrome (84455448).

The spelling of 80005440 in words is "eighty million, five thousand, four hundred forty".