28357425 has 48 divisors (see below), whose sum is σ = 53359680. Its totient is φ = 14757120.

The previous prime is 28357423. The next prime is 28357453. The reversal of 28357425 is 52475382.

28357425 is a `hidden beast` number, since 2 + 83 + 574 + 2 + 5 = 666.

It is not a de Polignac number, because 28357425 - 2¹ = 28357423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28357425.

It is not an unprimeable number, because it can be changed into a prime (28357421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28537 + ... + 29513.

It is an arithmetic number, because the mean of its divisors is an integer number (1111660).

Almost surely, 2^28357425 is an apocalyptic number.

28357425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28357425 is a deficient number, since it is larger than the sum of its proper divisors (25002255).

28357425 is a wasteful number, since it uses less digits than its factorization.

28357425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039 (or 1028 counting only the distinct ones).

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

The square root of 28357425 is about 5325.1690114024. The cubic root of 28357425 is about 304.9455246254.

It can be divided in two parts, 28357 and 425, that added together give a palindrome (28782).

The spelling of 28357425 in words is "twenty-eight million, three hundred fifty-seven thousand, four hundred twenty-five".