25417920 has 224 divisors, whose sum is σ = 92171520. Its totient is φ = 5877760.

The previous prime is 25417897. The next prime is 25417937. The reversal of 25417920 is 2971452.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 306199 + ... + 306281.

It is an arithmetic number, because the mean of its divisors is an integer number (411480).

Almost surely, 2^25417920 is an apocalyptic number.

25417920 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 25417920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46085760).

25417920 is an abundant number, since it is smaller than the sum of its proper divisors (66753600).

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

25417920 is a wasteful number, since it uses less digits than its factorization.

25417920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 25417920 is about 5041.6187876514. The cubic root of 25417920 is about 294.0221187487.

The spelling of 25417920 in words is "twenty-five million, four hundred seventeen thousand, nine hundred twenty".