28049525 has 24 divisors (see below), whose sum is σ = 41128320. Its totient is φ = 18567360.

The previous prime is 28049509. The next prime is 28049537. The reversal of 28049525 is 52594082.

It is a happy number.

It is not a de Polignac number, because 28049525 - 2⁴ = 28049509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2312 + ... + 7838.

It is an arithmetic number, because the mean of its divisors is an integer number (1713680).

Almost surely, 2^28049525 is an apocalyptic number.

28049525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28049525 is a deficient number, since it is larger than the sum of its proper divisors (13078795).

28049525 is a wasteful number, since it uses less digits than its factorization.

28049525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5573 (or 5568 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 28049525 is about 5296.1802272959. The cubic root of 28049525 is about 303.8378239616.

The spelling of 28049525 in words is "twenty-eight million, forty-nine thousand, five hundred twenty-five".