80436405 has 64 divisors (see below), whose sum is σ = 161648640. Its totient is φ = 33302016.

The previous prime is 80436371. The next prime is 80436407. The reversal of 80436405 is 50463408.

It is not a de Polignac number, because 80436405 - 2⁷ = 80436277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80436407) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 45009 + ... + 46761.

It is an arithmetic number, because the mean of its divisors is an integer number (2525760).

Almost surely, 2^80436405 is an apocalyptic number.

It is an amenable number.

80436405 is an abundant number, since it is smaller than the sum of its proper divisors (81212235).

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

80436405 is a wasteful number, since it uses less digits than its factorization.

80436405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 80436405 is about 8968.6345114516. The cubic root of 80436405 is about 431.6690226778.

The spelling of 80436405 in words is "eighty million, four hundred thirty-six thousand, four hundred five".