1185808080 has 40 divisors (see below), whose sum is σ = 3676005792. Its totient is φ = 316215424.

The previous prime is 1185808067. The next prime is 1185808087. The reversal of 1185808080 is 808085811.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1185808080² = 2812281605186572800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1185808087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2470194 + ... + 2470673.

Almost surely, 2^1185808080 is an apocalyptic number.

1185808080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1185808080 is an abundant number, since it is smaller than the sum of its proper divisors (2490197712).

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

1185808080 is a wasteful number, since it uses less digits than its factorization.

1185808080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4940883 (or 4940877 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 39.

The square root of 1185808080 is about 34435.5641742661. The cubic root of 1185808080 is about 1058.4527324870.

The spelling of 1185808080 in words is "one billion, one hundred eighty-five million, eight hundred eight thousand, eighty".