80353640 has 32 divisors (see below), whose sum is σ = 185685480. Its totient is φ = 31272192.

The previous prime is 80353639. The next prime is 80353649. The reversal of 80353640 is 4635308.

It can be written as a sum of positive squares in 4 ways, for example, as 78605956 + 1747684 = 8866^2 + 1322^2 .

It is a super-2 number, since 2×80353640² = 12913414922499200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80353649) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 25667 + ... + 28626.

Almost surely, 2^80353640 is an apocalyptic number.

It is an amenable number.

80353640 is an abundant number, since it is smaller than the sum of its proper divisors (105331840).

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

80353640 is a wasteful number, since it uses less digits than its factorization.

80353640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54341 (or 54337 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 80353640 is about 8964.0191878420. The cubic root of 80353640 is about 431.5209166576.

Adding to 80353640 its reverse (4635308), we get a palindrome (84988948).

The spelling of 80353640 in words is "eighty million, three hundred fifty-three thousand, six hundred forty".