28146725 has 12 divisors (see below), whose sum is σ = 35714976. Its totient is φ = 21992880.

The previous prime is 28146721. The next prime is 28146731. The reversal of 28146725 is 52764182.

It is not a de Polignac number, because 28146725 - 2² = 28146721 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28146721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12017 + ... + 14166.

It is an arithmetic number, because the mean of its divisors is an integer number (2976248).

Almost surely, 2^28146725 is an apocalyptic number.

28146725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28146725 is a deficient number, since it is larger than the sum of its proper divisors (7568251).

28146725 is a wasteful number, since it uses less digits than its factorization.

28146725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26236 (or 26231 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 28146725 is about 5305.3487161543. The cubic root of 28146725 is about 304.1883823448.

The spelling of 28146725 in words is "twenty-eight million, one hundred forty-six thousand, seven hundred twenty-five".