25722540 has 36 divisors (see below), whose sum is σ = 78025584. Its totient is φ = 6859296.

The previous prime is 25722517. The next prime is 25722551. The reversal of 25722540 is 4522752.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71272 + ... + 71631.

Almost surely, 2^25722540 is an apocalyptic number.

25722540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25722540 is an abundant number, since it is smaller than the sum of its proper divisors (52303044).

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

25722540 is a wasteful number, since it uses less digits than its factorization.

25722540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142918 (or 142913 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 25722540 is about 5071.7393466147. The cubic root of 25722540 is about 295.1920228307.

It can be divided in two parts, 25722 and 540, that added together give a palindrome (26262).

The spelling of 25722540 in words is "twenty-five million, seven hundred twenty-two thousand, five hundred forty".