25140280 has 64 divisors (see below), whose sum is σ = 65357280. Its totient is φ = 8601600.

The previous prime is 25140277. The next prime is 25140281. The reversal of 25140280 is 8204152.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25140281) 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, 5800 + ... + 9160.

Almost surely, 2^25140280 is an apocalyptic number.

25140280 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 25140280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32678640).

25140280 is an abundant number, since it is smaller than the sum of its proper divisors (40217000).

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

25140280 is a wasteful number, since it uses less digits than its factorization.

25140280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3400 (or 3396 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 25140280 is about 5014.0083765387. The cubic root of 25140280 is about 292.9476623388.

The spelling of 25140280 in words is "twenty-five million, one hundred forty thousand, two hundred eighty".