25072740 has 288 divisors, whose sum is σ = 99800064. Its totient is φ = 5132160.

The previous prime is 25072711. The next prime is 25072757. The reversal of 25072740 is 4727052.

It is a super-2 number, since 2×25072740² = 1257284582215200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 95 ways as a sum of consecutive naturals, for example, 374187 + ... + 374253.

It is an arithmetic number, because the mean of its divisors is an integer number (346528).

Almost surely, 2^25072740 is an apocalyptic number.

25072740 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 25072740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49900032).

25072740 is an abundant number, since it is smaller than the sum of its proper divisors (74727324).

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

25072740 is a wasteful number, since it uses less digits than its factorization.

25072740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 25072740 is about 5007.2687165759. The cubic root of 25072740 is about 292.6850899535.

Adding to 25072740 its reverse (4727052), we get a palindrome (29799792).

The spelling of 25072740 in words is "twenty-five million, seventy-two thousand, seven hundred forty".