80540390 has 64 divisors (see below), whose sum is σ = 178879104. Its totient is φ = 25479168.

The previous prime is 80540363. The next prime is 80540399. The reversal of 80540390 is 9304508.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80540399) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62432 + ... + 63708.

It is an arithmetic number, because the mean of its divisors is an integer number (2794986).

Almost surely, 2^80540390 is an apocalyptic number.

80540390 is an abundant number, since it is smaller than the sum of its proper divisors (98338714).

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

80540390 is a wasteful number, since it uses less digits than its factorization.

80540390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 80540390 is about 8974.4297869001. The cubic root of 80540390 is about 431.8549574522.

Adding to 80540390 its reverse (9304508), we get a palindrome (89844898).

The spelling of 80540390 in words is "eighty million, five hundred forty thousand, three hundred ninety".