538428 has 24 divisors (see below), whose sum is σ = 1370880. Its totient is φ = 163120.

The previous prime is 538423. The next prime is 538457. The reversal of 538428 is 824835.

538428 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 2×538428² = 579809422368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 538395 and 538404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538423) by changing a digit.

538428 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1908 + ... + 2171.

It is an arithmetic number, because the mean of its divisors is an integer number (57120).

2⁵³⁸⁴²⁸ is an apocalyptic number.

It is an amenable number.

538428 is an abundant number, since it is smaller than the sum of its proper divisors (832452).

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

538428 is a wasteful number, since it uses less digits than its factorization.

538428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4097 (or 4095 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

The square root of 538428 is about 733.7765327400. The cubic root of 538428 is about 81.3534319824.

The spelling of 538428 in words is "five hundred thirty-eight thousand, four hundred twenty-eight".