25974540 has 96 divisors (see below), whose sum is σ = 81768960. Its totient is φ = 6844608.

The previous prime is 25974527. The next prime is 25974583. The reversal of 25974540 is 4547952.

25974540 = T₇₆₀ + T₇₆₁ + ... + T₈₄₀.

25974540 is a `hidden beast` number, since 25 + 97 + 4 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 25974495 and 25974504.

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 31 ways as a sum of consecutive naturals, for example, 55387 + ... + 55853.

It is an arithmetic number, because the mean of its divisors is an integer number (851760).

Almost surely, 2^25974540 is an apocalyptic number.

25974540 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 25974540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40884480).

25974540 is an abundant number, since it is smaller than the sum of its proper divisors (55794420).

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

25974540 is a wasteful number, since it uses less digits than its factorization.

25974540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588 (or 580 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 25974540 is about 5096.5223437164. The cubic root of 25974540 is about 296.1528763499.

The spelling of 25974540 in words is "twenty-five million, nine hundred seventy-four thousand, five hundred forty".