25974240 has 96 divisors (see below), whose sum is σ = 83444256. Its totient is φ = 6789120.

The previous prime is 25974239. The next prime is 25974251. The reversal of 25974240 is 4247952.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×25974240² = 1349322287155200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24930 + ... + 25950.

It is an arithmetic number, because the mean of its divisors is an integer number (869211).

Almost surely, 2^25974240 is an apocalyptic number.

25974240 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 25974240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41722128).

25974240 is an abundant number, since it is smaller than the sum of its proper divisors (57470016).

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

25974240 is a wasteful number, since it uses less digits than its factorization.

25974240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092 (or 1084 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 25974240 is about 5096.4929117973. The cubic root of 25974240 is about 296.1517361795.

The spelling of 25974240 in words is "twenty-five million, nine hundred seventy-four thousand, two hundred forty".