25047540 has 144 divisors (see below), whose sum is σ = 88128768. Its totient is φ = 5640192.

The previous prime is 25047527. The next prime is 25047551. The reversal of 25047540 is 4574052.

It is a super-3 number, since 3×25047540³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 129684 + ... + 129876.

Almost surely, 2^25047540 is an apocalyptic number.

25047540 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 25047540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44064384).

25047540 is an abundant number, since it is smaller than the sum of its proper divisors (63081228).

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

25047540 is a wasteful number, since it uses less digits than its factorization.

25047540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318 (or 313 counting only the distinct ones).

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

The square root of 25047540 is about 5004.7517420947. The cubic root of 25047540 is about 292.5870001997.

The spelling of 25047540 in words is "twenty-five million, forty-seven thousand, five hundred forty".