11403828 has 60 divisors (see below), whose sum is σ = 30353092. Its totient is φ = 3732480.

The previous prime is 11403827. The next prime is 11403839. The reversal of 11403828 is 82830411.

It can be written as a sum of positive squares in 2 ways, for example, as 6260004 + 5143824 = 2502^2 + 2268^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11403827) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19476 + ... + 20052.

Almost surely, 2^11403828 is an apocalyptic number.

11403828 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 11403828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15176546).

11403828 is an abundant number, since it is smaller than the sum of its proper divisors (18949264).

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

11403828 is a wasteful number, since it uses less digits than its factorization.

11403828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654 (or 643 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 11403828 is about 3376.9554335229. The cubic root of 11403828 is about 225.0868997665.

The spelling of 11403828 in words is "eleven million, four hundred three thousand, eight hundred twenty-eight".