53728452 has 18 divisors (see below), whose sum is σ = 135813678. Its totient is φ = 17909472.

The previous prime is 53728429. The next prime is 53728463. The reversal of 53728452 is 25482735.

53728452 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 50466816 + 3261636 = 7104^2 + 1806^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1492457 = 53728452 / (5 + 3 + 7 + 2 + 8 + 4 + 5 + 2).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 746193 + ... + 746264.

Almost surely, 2^53728452 is an apocalyptic number.

It is an amenable number.

53728452 is an abundant number, since it is smaller than the sum of its proper divisors (82085226).

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

53728452 is a wasteful number, since it uses less digits than its factorization.

53728452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1492467 (or 1492462 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 53728452 is about 7329.9694405911. The cubic root of 53728452 is about 377.3416776850.

It can be divided in two parts, 5372 and 8452, that added together give a cube (13824 = 24³).

The spelling of 53728452 in words is "fifty-three million, seven hundred twenty-eight thousand, four hundred fifty-two".