80440605 has 54 divisors (see below), whose sum is σ = 163048158. Its totient is φ = 36580320.

The previous prime is 80440597. The next prime is 80440609. The reversal of 80440605 is 50604408.

It can be written as a sum of positive squares in only one way, i.e., 64352484 + 16088121 = 8022^2 + 4011^2 .

It is not a de Polignac number, because 80440605 - 2³ = 80440597 is a prime.

It is a super-3 number, since 3×80440605³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80440609) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 421060 + ... + 421250.

Almost surely, 2^80440605 is an apocalyptic number.

It is an amenable number.

80440605 is an abundant number, since it is smaller than the sum of its proper divisors (82607553).

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

80440605 is a wasteful number, since it uses less digits than its factorization.

80440605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 80440605 is about 8968.8686577517. The cubic root of 80440605 is about 431.6765357698.

The spelling of 80440605 in words is "eighty million, four hundred forty thousand, six hundred five".