1101238428 has 24 divisors (see below), whose sum is σ = 2629314688. Its totient is φ = 358542576.

The previous prime is 1101238421. The next prime is 1101238477. The reversal of 1101238428 is 8248321011.

It is a super-2 number, since 2×1101238428² = 2425452150607822368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1101238395 and 1101238404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101238421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1066576 + ... + 1067607.

Almost surely, 2^1101238428 is an apocalyptic number.

It is an amenable number.

1101238428 is an abundant number, since it is smaller than the sum of its proper divisors (1528076260).

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

1101238428 is a wasteful number, since it uses less digits than its factorization.

1101238428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2134233 (or 2134231 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 1101238428 is about 33184.9126562057. The cubic root of 1101238428 is about 1032.6673654980.

Adding to 1101238428 its reverse (8248321011), we get a palindrome (9349559439).

The spelling of 1101238428 in words is "one billion, one hundred one million, two hundred thirty-eight thousand, four hundred twenty-eight".