11229978 has 24 divisors (see below), whose sum is σ = 22879584. Its totient is φ = 3674640.

The previous prime is 11229973. The next prime is 11230031. The reversal of 11229978 is 87992211.

It is a super-2 number, since 2×11229978² = 252224811760968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11229973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22075 + ... + 22577.

It is an arithmetic number, because the mean of its divisors is an integer number (953316).

Almost surely, 2^11229978 is an apocalyptic number.

11229978 is an abundant number, since it is smaller than the sum of its proper divisors (11649606).

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

11229978 is an equidigital number, since it uses as much as digits as its factorization.

11229978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630 (or 569 counting only the distinct ones).

The product of its digits is 18144, while the sum is 39.

The square root of 11229978 is about 3351.1159335362. The cubic root of 11229978 is about 223.9372299673.

The spelling of 11229978 in words is "eleven million, two hundred twenty-nine thousand, nine hundred seventy-eight".