175138428 has 36 divisors (see below), whose sum is σ = 431307240. Its totient is φ = 55305504.

The previous prime is 175138423. The next prime is 175138451. The reversal of 175138428 is 824831571.

175138428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×175138428² = 61346937924622368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (175138421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15883 + ... + 24546.

Almost surely, 2^175138428 is an apocalyptic number.

It is an amenable number.

175138428 is an abundant number, since it is smaller than the sum of its proper divisors (256168812).

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

175138428 is a wasteful number, since it uses less digits than its factorization.

175138428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40474 (or 40453 counting only the distinct ones).

The product of its digits is 53760, while the sum is 39.

The square root of 175138428 is about 13233.9876076714. The cubic root of 175138428 is about 559.4919158589.

Adding to 175138428 its reverse (824831571), we get a palindrome (999969999).

The spelling of 175138428 in words is "one hundred seventy-five million, one hundred thirty-eight thousand, four hundred twenty-eight".