1238428 has 12 divisors (see below), whose sum is σ = 2200072. Its totient is φ = 609840.

The previous prime is 1238423. The next prime is 1238429. The reversal of 1238428 is 8248321.

It is a super-2 number, since 2×1238428² = 3067407822368, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1238396 and 1238405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2043 + ... + 2578.

2^1238428 is an apocalyptic number.

It is an amenable number.

1238428 is a deficient number, since it is larger than the sum of its proper divisors (961644).

1238428 is a wasteful number, since it uses less digits than its factorization.

1238428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4692 (or 4690 counting only the distinct ones).

The product of its digits is 3072, while the sum is 28.

The square root of 1238428 is about 1112.8467998786. The cubic root of 1238428 is about 107.3882884952.

The spelling of 1238428 in words is "one million, two hundred thirty-eight thousand, four hundred twenty-eight".