25616280 has 128 divisors (see below), whose sum is σ = 84369600. Its totient is φ = 6193152.

The previous prime is 25616257. The next prime is 25616287. The reversal of 25616280 is 8261652.

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

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 433 × 145 × 408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25616287) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58944 + ... + 59376.

Almost surely, 2^25616280 is an apocalyptic number.

25616280 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 25616280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42184800).

25616280 is an abundant number, since it is smaller than the sum of its proper divisors (58753320).

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

25616280 is a wasteful number, since it uses less digits than its factorization.

25616280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493 (or 489 counting only the distinct ones).

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

The square root of 25616280 is about 5061.2528093349. The cubic root of 25616280 is about 294.7849816867.

The spelling of 25616280 in words is "twenty-five million, six hundred sixteen thousand, two hundred eighty".