25206720 has 336 divisors, whose sum is σ = 103778304. Its totient is φ = 5068800.

The previous prime is 25206697. The next prime is 25206737. The reversal of 25206720 is 2760252.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 813105 + ... + 813135.

It is an arithmetic number, because the mean of its divisors is an integer number (308864).

Almost surely, 2^25206720 is an apocalyptic number.

25206720 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 25206720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51889152).

25206720 is an abundant number, since it is smaller than the sum of its proper divisors (78571584).

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

25206720 is a wasteful number, since it uses less digits than its factorization.

25206720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 25206720 is about 5020.6294426098. The cubic root of 25206720 is about 293.2054998543.

Adding to 25206720 its reverse (2760252), we get a palindrome (27966972).

The spelling of 25206720 in words is "twenty-five million, two hundred six thousand, seven hundred twenty".