25388891 has 8 divisors (see below), whose sum is σ = 28652400. Its totient is φ = 22284640.

The previous prime is 25388887. The next prime is 25388893. The reversal of 25388891 is 19888352.

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

It is a cyclic number.

It is not a de Polignac number, because 25388891 - 2² = 25388887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25388893) 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, 39476 + ... + 40113.

It is an arithmetic number, because the mean of its divisors is an integer number (3581550).

Almost surely, 2^25388891 is an apocalyptic number.

25388891 is a deficient number, since it is larger than the sum of its proper divisors (3263509).

25388891 is a wasteful number, since it uses less digits than its factorization.

25388891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79629.

The product of its digits is 138240, while the sum is 44.

The square root of 25388891 is about 5038.7390287650. The cubic root of 25388891 is about 293.9101449995.

The spelling of 25388891 in words is "twenty-five million, three hundred eighty-eight thousand, eight hundred ninety-one".