25039820 has 48 divisors (see below), whose sum is σ = 57036000. Its totient is φ = 9179136.

The previous prime is 25039799. The next prime is 25039823. The reversal of 25039820 is 2893052.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25039823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49931 + ... + 50429.

It is an arithmetic number, because the mean of its divisors is an integer number (1188250).

Almost surely, 2^25039820 is an apocalyptic number.

25039820 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 25039820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28518000).

25039820 is an abundant number, since it is smaller than the sum of its proper divisors (31996180).

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

25039820 is a wasteful number, since it uses less digits than its factorization.

25039820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714 (or 712 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 25039820 is about 5003.9804156291. The cubic root of 25039820 is about 292.5569373174.

The spelling of 25039820 in words is "twenty-five million, thirty-nine thousand, eight hundred twenty".