11229728 has 24 divisors (see below), whose sum is σ = 22872780. Its totient is φ = 5420800.

The previous prime is 11229697. The next prime is 11229731. The reversal of 11229728 is 82792211.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9560464 + 1669264 = 3092^2 + 1292^2 .

It is a super-2 number, since 2×11229728² = 252213581907968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 11229694 and 11229703.

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, 5123 + ... + 6978.

Almost surely, 2^11229728 is an apocalyptic number.

It is an amenable number.

11229728 is an abundant number, since it is smaller than the sum of its proper divisors (11643052).

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

11229728 is a wasteful number, since it uses less digits than its factorization.

11229728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12140 (or 12132 counting only the distinct ones).

The product of its digits is 4032, while the sum is 32.

The square root of 11229728 is about 3351.0786323212. The cubic root of 11229728 is about 223.9355682032.

The spelling of 11229728 in words is "eleven million, two hundred twenty-nine thousand, seven hundred twenty-eight".