24995640 has 96 divisors (see below), whose sum is σ = 79278480. Its totient is φ = 6303744.

The previous prime is 24995629. The next prime is 24995647. The reversal of 24995640 is 4659942.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24995647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43032 + ... + 43608.

Almost surely, 2^24995640 is an apocalyptic number.

24995640 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 24995640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39639240).

24995640 is an abundant number, since it is smaller than the sum of its proper divisors (54282840).

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

24995640 is a wasteful number, since it uses less digits than its factorization.

24995640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629 (or 606 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 24995640 is about 4999.5639809887. The cubic root of 24995640 is about 292.3847745432.

The spelling of 24995640 in words is "twenty-four million, nine hundred ninety-five thousand, six hundred forty".