80855040 has 240 divisors, whose sum is σ = 301980672. Its totient is φ = 18087936.

The previous prime is 80855039. The next prime is 80855041. The reversal of 80855040 is 4055808.

It is an interprime number because it is at equal distance from previous prime (80855039) and next prime (80855041).

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 80854989 and 80855007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80855041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1720297 + ... + 1720343.

Almost surely, 2^80855040 is an apocalyptic number.

80855040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80855040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150990336).

80855040 is an abundant number, since it is smaller than the sum of its proper divisors (221125632).

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

80855040 is an equidigital number, since it uses as much as digits as its factorization.

80855040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 30.

The square root of 80855040 is about 8991.9430603179. The cubic root of 80855040 is about 432.4166077092.

The spelling of 80855040 in words is "eighty million, eight hundred fifty-five thousand, forty".