547428 has 60 divisors (see below), whose sum is σ = 1568560. Its totient is φ = 148176.

The previous prime is 547411. The next prime is 547441. The reversal of 547428 is 824745.

It is an Ulam number.

It is a nialpdrome in base 7.

It is a zygodrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 547395 and 547404.

It is an unprimeable number.

547428 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 19 ways as a sum of consecutive naturals, for example, 28803 + ... + 28821.

547428 is a Friedman number, since it can be written as 28^4-7^5*4, using all its digits and the basic arithmetic operations.

2⁵⁴⁷⁴²⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 547428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (784280).

547428 is an abundant number, since it is smaller than the sum of its proper divisors (1021132).

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

547428 is a wasteful number, since it uses less digits than its factorization.

547428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54 (or 31 counting only the distinct ones).

The product of its digits is 8960, while the sum is 30.

The square root of 547428 is about 739.8837746565. The cubic root of 547428 is about 81.8042126544.

The spelling of 547428 in words is "five hundred forty-seven thousand, four hundred twenty-eight".