25009428 has 24 divisors (see below), whose sum is σ = 59457888. Its totient is φ = 8178976.

The previous prime is 25009427. The next prime is 25009429. The reversal of 25009428 is 82490052.

It is an interprime number because it is at equal distance from previous prime (25009427) and next prime (25009429).

It is a junction number, because it is equal to n+sod(n) for n = 25009395 and 25009404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25009421) 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, 19026 + ... + 20297.

It is an arithmetic number, because the mean of its divisors is an integer number (2477412).

Almost surely, 2^25009428 is an apocalyptic number.

It is an amenable number.

25009428 is an abundant number, since it is smaller than the sum of its proper divisors (34448460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25009428 is a wasteful number, since it uses less digits than its factorization.

25009428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39383 (or 39381 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 25009428 is about 5000.9427111296. The cubic root of 25009428 is about 292.4385260540.

The spelling of 25009428 in words is "twenty-five million, nine thousand, four hundred twenty-eight".