53725428 has 36 divisors (see below), whose sum is σ = 136204068. Its totient is φ = 17856000.

The previous prime is 53725421. The next prime is 53725433. The reversal of 53725428 is 82452735.

It can be written as a sum of positive squares in 2 ways, for example, as 13046544 + 40678884 = 3612^2 + 6378^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×53725428² = 5772843227566368, which contains 22 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 = 53725392 and 53725401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53725421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11428 + ... + 15428.

Almost surely, 2^53725428 is an apocalyptic number.

It is an amenable number.

53725428 is an abundant number, since it is smaller than the sum of its proper divisors (82478640).

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

53725428 is a wasteful number, since it uses less digits than its factorization.

53725428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4384 (or 4379 counting only the distinct ones).

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

The square root of 53725428 is about 7329.7631612488. The cubic root of 53725428 is about 377.3345982413.

The spelling of 53725428 in words is "fifty-three million, seven hundred twenty-five thousand, four hundred twenty-eight".