11421388 has 12 divisors (see below), whose sum is σ = 21804552. Its totient is φ = 5191520.

The previous prime is 11421379. The next prime is 11421401. The reversal of 11421388 is 88312411.

11421388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 129745 + ... + 129832.

It is an arithmetic number, because the mean of its divisors is an integer number (1817046).

Almost surely, 2^11421388 is an apocalyptic number.

It is an amenable number.

11421388 is a deficient number, since it is larger than the sum of its proper divisors (10383164).

11421388 is a wasteful number, since it uses less digits than its factorization.

11421388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259592 (or 259590 counting only the distinct ones).

The product of its digits is 1536, while the sum is 28.

The square root of 11421388 is about 3379.5544084983. The cubic root of 11421388 is about 225.2023726571.

Adding to 11421388 its reverse (88312411), we get a palindrome (99733799).

The spelling of 11421388 in words is "eleven million, four hundred twenty-one thousand, three hundred eighty-eight".