11409978 has 32 divisors (see below), whose sum is σ = 24105600. Its totient is φ = 3593216.

The previous prime is 11409977. The next prime is 11409991. The reversal of 11409978 is 87990411.

It is a happy number.

11409978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (11409971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11818 + ... + 12746.

It is an arithmetic number, because the mean of its divisors is an integer number (753300).

Almost surely, 2^11409978 is an apocalyptic number.

11409978 is an abundant number, since it is smaller than the sum of its proper divisors (12695622).

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

11409978 is a wasteful number, since it uses less digits than its factorization.

11409978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046.

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

The square root of 11409978 is about 3377.8658943185. The cubic root of 11409978 is about 225.1273550611.

The spelling of 11409978 in words is "eleven million, four hundred nine thousand, nine hundred seventy-eight".