25229989 has 12 divisors (see below), whose sum is σ = 27222304. Its totient is φ = 23373504.

The previous prime is 25229957. The next prime is 25229999. The reversal of 25229989 is 98992252.

It is not a de Polignac number, because 25229989 - 2⁵ = 25229957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25229909) 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, 18712 + ... + 20014.

Almost surely, 2^25229989 is an apocalyptic number.

It is an amenable number.

25229989 is a deficient number, since it is larger than the sum of its proper divisors (1992315).

25229989 is a wasteful number, since it uses less digits than its factorization.

25229989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404 (or 1387 counting only the distinct ones).

The product of its digits is 233280, while the sum is 46.

The square root of 25229989 is about 5022.9462469750. The cubic root of 25229989 is about 293.2956940628.

The spelling of 25229989 in words is "twenty-five million, two hundred twenty-nine thousand, nine hundred eighty-nine".