10921428 has 72 divisors (see below), whose sum is σ = 33225920. Its totient is φ = 2954880.

The previous prime is 10921423. The next prime is 10921439. The reversal of 10921428 is 82412901.

10921428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10921423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3648 + ... + 5928.

Almost surely, 2^10921428 is an apocalyptic number.

10921428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10921428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16612960).

10921428 is an abundant number, since it is smaller than the sum of its proper divisors (22304492).

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

10921428 is a wasteful number, since it uses less digits than its factorization.

10921428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2317 (or 2312 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 10921428 is about 3304.7583875376. The cubic root of 10921428 is about 221.8672203316.

The spelling of 10921428 in words is "ten million, nine hundred twenty-one thousand, four hundred twenty-eight".