28526725 has 12 divisors (see below), whose sum is σ = 35773380. Its totient is φ = 22563200.

The previous prime is 28526723. The next prime is 28526767. The reversal of 28526725 is 52762582.

It can be written as a sum of positive squares in 6 ways, for example, as 8608356 + 19918369 = 2934^2 + 4463^2 .

It is not a de Polignac number, because 28526725 - 2¹ = 28526723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28526723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4186 + ... + 8635.

It is an arithmetic number, because the mean of its divisors is an integer number (2981115).

Almost surely, 2^28526725 is an apocalyptic number.

28526725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28526725 is a deficient number, since it is larger than the sum of its proper divisors (7246655).

28526725 is a wasteful number, since it uses less digits than its factorization.

28526725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12920 (or 12915 counting only the distinct ones).

The product of its digits is 67200, while the sum is 37.

The square root of 28526725 is about 5341.0415650882. The cubic root of 28526725 is about 305.5511846329.

The spelling of 28526725 in words is "twenty-eight million, five hundred twenty-six thousand, seven hundred twenty-five".