542628 has 18 divisors (see below), whose sum is σ = 1371734. Its totient is φ = 180864.

The previous prime is 542603. The next prime is 542683. The reversal of 542628 is 826245.

It can be written as a sum of positive squares in only one way, i.e., 459684 + 82944 = 678^2 + 288^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

542628 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 5 ways as a sum of consecutive naturals, for example, 7501 + ... + 7572.

2⁵⁴²⁶²⁸ is an apocalyptic number.

It is an amenable number.

542628 is an abundant number, since it is smaller than the sum of its proper divisors (829106).

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

542628 is a wasteful number, since it uses less digits than its factorization.

542628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15083 (or 15078 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 542628 is about 736.6328800698. The cubic root of 542628 is about 81.5644164345.

The spelling of 542628 in words is "five hundred forty-two thousand, six hundred twenty-eight".