11890428 has 72 divisors (see below), whose sum is σ = 32175360. Its totient is φ = 3405600.

The previous prime is 11890421. The next prime is 11890469. The reversal of 11890428 is 82409811.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11890421) 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, 27373 + ... + 27803.

It is an arithmetic number, because the mean of its divisors is an integer number (446880).

Almost surely, 2^11890428 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 11890428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16087680).

11890428 is an abundant number, since it is smaller than the sum of its proper divisors (20284932).

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

11890428 is a wasteful number, since it uses less digits than its factorization.

11890428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 11890428 is about 3448.2499909374. The cubic root of 11890428 is about 228.2438910641.

The spelling of 11890428 in words is "eleven million, eight hundred ninety thousand, four hundred twenty-eight".