52228728 has 24 divisors (see below), whose sum is σ = 141453000. Its totient is φ = 17409552.

The previous prime is 52228727. The next prime is 52228741. The reversal of 52228728 is 82782225.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-4 number, since 4×52228728⁴ (a number of 32 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 52228692 and 52228701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52228727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 362628 + ... + 362771.

It is an arithmetic number, because the mean of its divisors is an integer number (5893875).

Almost surely, 2^52228728 is an apocalyptic number.

It is an amenable number.

52228728 is an abundant number, since it is smaller than the sum of its proper divisors (89224272).

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

52228728 is a wasteful number, since it uses less digits than its factorization.

52228728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725411 (or 725404 counting only the distinct ones).

The product of its digits is 35840, while the sum is 36.

The square root of 52228728 is about 7226.9445826020. The cubic root of 52228728 is about 373.7975779373.

The spelling of 52228728 in words is "fifty-two million, two hundred twenty-eight thousand, seven hundred twenty-eight".