11278980 has 48 divisors (see below), whose sum is σ = 35091840. Its totient is φ = 3007584.

The previous prime is 11278979. The next prime is 11279003. The reversal of 11278980 is 8987211.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9904 + ... + 10983.

It is an arithmetic number, because the mean of its divisors is an integer number (731080).

Almost surely, 2^11278980 is an apocalyptic number.

11278980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11278980 is an abundant number, since it is smaller than the sum of its proper divisors (23812860).

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

11278980 is a wasteful number, since it uses less digits than its factorization.

11278980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20905 (or 20897 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 11278980 is about 3358.4192710262. The cubic root of 11278980 is about 224.2624739988.

The spelling of 11278980 in words is "eleven million, two hundred seventy-eight thousand, nine hundred eighty".