25289380 has 48 divisors (see below), whose sum is σ = 56871360. Its totient is φ = 9417600.

The previous prime is 25289377. The next prime is 25289477. The reversal of 25289380 is 8398252.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22635 + ... + 23725.

It is an arithmetic number, because the mean of its divisors is an integer number (1184820).

Almost surely, 2^25289380 is an apocalyptic number.

25289380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25289380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28435680).

25289380 is an abundant number, since it is smaller than the sum of its proper divisors (31581980).

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

25289380 is a wasteful number, since it uses less digits than its factorization.

25289380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180 (or 1178 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 25289380 is about 5028.8547403957. The cubic root of 25289380 is about 293.5256515458.

The spelling of 25289380 in words is "twenty-five million, two hundred eighty-nine thousand, three hundred eighty".