28525737 has 8 divisors (see below), whose sum is σ = 38172736. Its totient is φ = 18947952.

The previous prime is 28525691. The next prime is 28525753. The reversal of 28525737 is 73752582.

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

It is not a de Polignac number, because 28525737 - 2²⁴ = 11748521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28525695 and 28525704.

It is not an unprimeable number, because it can be changed into a prime (28525787) 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, 16333 + ... + 17994.

It is an arithmetic number, because the mean of its divisors is an integer number (4771592).

Almost surely, 2^28525737 is an apocalyptic number.

It is an amenable number.

28525737 is a deficient number, since it is larger than the sum of its proper divisors (9646999).

28525737 is a wasteful number, since it uses less digits than its factorization.

28525737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34607.

The product of its digits is 117600, while the sum is 39.

The square root of 28525737 is about 5340.9490729645. The cubic root of 28525737 is about 305.5476570863.

The spelling of 28525737 in words is "twenty-eight million, five hundred twenty-five thousand, seven hundred thirty-seven".