80040261 has 32 divisors (see below), whose sum is σ = 127088640. Its totient is φ = 43839936.

The previous prime is 80040239. The next prime is 80040263. The reversal of 80040261 is 16204008.

It is not a de Polignac number, because 80040261 - 2⁷ = 80040133 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80040263) 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 31 ways as a sum of consecutive naturals, for example, 101310 + ... + 102096.

It is an arithmetic number, because the mean of its divisors is an integer number (3971520).

Almost surely, 2^80040261 is an apocalyptic number.

It is an amenable number.

80040261 is a deficient number, since it is larger than the sum of its proper divisors (47048379).

80040261 is a wasteful number, since it uses less digits than its factorization.

80040261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 80040261 is about 8946.5222852235. The cubic root of 80040261 is about 430.9592089632.

Adding to 80040261 its reverse (16204008), we get a palindrome (96244269).

The spelling of 80040261 in words is "eighty million, forty thousand, two hundred sixty-one".