11421928 has 32 divisors (see below), whose sum is σ = 24897600. Its totient is φ = 4810752.

The previous prime is 11421913. The next prime is 11421947. The reversal of 11421928 is 82912411.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 11421896 and 11421905.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1576 + ... + 5032.

It is an arithmetic number, because the mean of its divisors is an integer number (778050).

Almost surely, 2^11421928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11421928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12448800).

11421928 is an abundant number, since it is smaller than the sum of its proper divisors (13475672).

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

11421928 is a wasteful number, since it uses less digits than its factorization.

11421928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3529 (or 3525 counting only the distinct ones).

The product of its digits is 1152, while the sum is 28.

The square root of 11421928 is about 3379.6342997431. The cubic root of 11421928 is about 225.2059217693.

The spelling of 11421928 in words is "eleven million, four hundred twenty-one thousand, nine hundred twenty-eight".