25723140 has 48 divisors (see below), whose sum is σ = 73977792. Its totient is φ = 6673536.

The previous prime is 25723133. The next prime is 25723141. The reversal of 25723140 is 4132752.

It is a self number, because there is not a number n which added to its sum of digits gives 25723140.

It is not an unprimeable number, because it can be changed into a prime (25723141) 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, 3574 + ... + 8013.

It is an arithmetic number, because the mean of its divisors is an integer number (1541204).

Almost surely, 2^25723140 is an apocalyptic number.

25723140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25723140 is an abundant number, since it is smaller than the sum of its proper divisors (48254652).

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

25723140 is a wasteful number, since it uses less digits than its factorization.

25723140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11636 (or 11634 counting only the distinct ones).

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

The square root of 25723140 is about 5071.7984975746. The cubic root of 25723140 is about 295.1943180140.

Adding to 25723140 its reverse (4132752), we get a palindrome (29855892).

The spelling of 25723140 in words is "twenty-five million, seven hundred twenty-three thousand, one hundred forty".