80136880 has 40 divisors (see below), whose sum is σ = 190291392. Its totient is φ = 31371264.

The previous prime is 80136863. The next prime is 80136883. The reversal of 80136880 is 8863108.

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

It is a super-2 number, since 2×80136880² = 12843839072268800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (80136883) 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, 6897 + ... + 14416.

Almost surely, 2^80136880 is an apocalyptic number.

80136880 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80136880 is an abundant number, since it is smaller than the sum of its proper divisors (110154512).

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

80136880 is a wasteful number, since it uses less digits than its factorization.

80136880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21373 (or 21367 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 80136880 is about 8951.9204643473. The cubic root of 80136880 is about 431.1325471641.

Adding to 80136880 its reverse (8863108), we get a palindrome (88999988).

The spelling of 80136880 in words is "eighty million, one hundred thirty-six thousand, eight hundred eighty".