52420728 has 16 divisors (see below), whose sum is σ = 131051880. Its totient is φ = 17473568.

The previous prime is 52420699. The next prime is 52420729. The reversal of 52420728 is 82702425.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 52420695 and 52420704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52420729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1092075 + ... + 1092122.

Almost surely, 2^52420728 is an apocalyptic number.

It is an amenable number.

52420728 is an abundant number, since it is smaller than the sum of its proper divisors (78631152).

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

52420728 is a wasteful number, since it uses less digits than its factorization.

52420728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2184206 (or 2184202 counting only the distinct ones).

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

The square root of 52420728 is about 7240.2160188768. The cubic root of 52420728 is about 374.2550616024.

The spelling of 52420728 in words is "fifty-two million, four hundred twenty thousand, seven hundred twenty-eight".