28525403 has 8 divisors (see below), whose sum is σ = 30183120. Its totient is φ = 26883360.

The previous prime is 28525391. The next prime is 28525411. The reversal of 28525403 is 30452582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28525403 - 2¹² = 28521307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28525423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68 + ... + 7553.

It is an arithmetic number, because the mean of its divisors is an integer number (3772890).

Almost surely, 2^28525403 is an apocalyptic number.

28525403 is a deficient number, since it is larger than the sum of its proper divisors (1657717).

28525403 is a wasteful number, since it uses less digits than its factorization.

28525403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7837.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 28525403 is about 5340.9178050219. The cubic root of 28525403 is about 305.5464645572.

Adding to 28525403 its reverse (30452582), we get a palindrome (58977985).

The spelling of 28525403 in words is "twenty-eight million, five hundred twenty-five thousand, four hundred three".