1233428 has 48 divisors (see below), whose sum is σ = 2688000. Its totient is φ = 493920.

The previous prime is 1233409. The next prime is 1233431. The reversal of 1233428 is 8243321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39773 + ... + 39803.

It is an arithmetic number, because the mean of its divisors is an integer number (56000).

2^1233428 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 1233428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1344000).

1233428 is an abundant number, since it is smaller than the sum of its proper divisors (1454572).

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

1233428 is a wasteful number, since it uses less digits than its factorization.

1233428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85 (or 69 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 1233428 is about 1110.5980370953. The cubic root of 1233428 is about 107.2435712463.

Adding to 1233428 its reverse (8243321), we get a palindrome (9476749).

It can be divided in two parts, 1233 and 428, that added together give a palindrome (1661).

The spelling of 1233428 in words is "one million, two hundred thirty-three thousand, four hundred twenty-eight".