11288980 has 12 divisors (see below), whose sum is σ = 23706900. Its totient is φ = 4515584.

The previous prime is 11288923. The next prime is 11288999. The reversal of 11288980 is 8988211.

It can be written as a sum of positive squares in 2 ways, for example, as 3549456 + 7739524 = 1884^2 + 2782^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282205 + ... + 282244.

It is an arithmetic number, because the mean of its divisors is an integer number (1975575).

Almost surely, 2^11288980 is an apocalyptic number.

11288980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11288980 is an abundant number, since it is smaller than the sum of its proper divisors (12417920).

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

11288980 is a wasteful number, since it uses less digits than its factorization.

11288980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564458 (or 564456 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 37.

The square root of 11288980 is about 3359.9077368285. The cubic root of 11288980 is about 224.3287318310.

The spelling of 11288980 in words is "eleven million, two hundred eighty-eight thousand, nine hundred eighty".