80806140 has 96 divisors (see below), whose sum is σ = 253317120. Its totient is φ = 21384000.

The previous prime is 80806111. The next prime is 80806157. The reversal of 80806140 is 4160808.

80806140 = T₁₈₅ + T₁₈₆ + ... + T₇₈₈.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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, 81045 + ... + 82035.

It is an arithmetic number, because the mean of its divisors is an integer number (2638720).

Almost surely, 2^80806140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80806140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126658560).

80806140 is an abundant number, since it is smaller than the sum of its proper divisors (172510980).

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

80806140 is a wasteful number, since it uses less digits than its factorization.

80806140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160 (or 1152 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 80806140 is about 8989.2235482271. The cubic root of 80806140 is about 432.3294169527.

Adding to 80806140 its reverse (4160808), we get a palindrome (84966948).

The spelling of 80806140 in words is "eighty million, eight hundred six thousand, one hundred forty".