25028391 has 16 divisors (see below), whose sum is σ = 34417664. Its totient is φ = 16166304.

The previous prime is 25028383. The next prime is 25028407. The reversal of 25028391 is 19382052.

It is a happy number.

It is not a de Polignac number, because 25028391 - 2³ = 25028383 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 (25028321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51150 + ... + 51636.

It is an arithmetic number, because the mean of its divisors is an integer number (2151104).

Almost surely, 2^25028391 is an apocalyptic number.

25028391 is a deficient number, since it is larger than the sum of its proper divisors (9389273).

25028391 is a wasteful number, since it uses less digits than its factorization.

25028391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 25028391 is about 5002.8382944085. The cubic root of 25028391 is about 292.5124196640.

The spelling of 25028391 in words is "twenty-five million, twenty-eight thousand, three hundred ninety-one".