25620144 has 40 divisors (see below), whose sum is σ = 72203712. Its totient is φ = 7763520.

The previous prime is 25620143. The next prime is 25620149. The reversal of 25620144 is 44102652.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (25620143) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 23734 + ... + 24789.

Almost surely, 2^25620144 is an apocalyptic number.

25620144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25620144 is an abundant number, since it is smaller than the sum of its proper divisors (46583568).

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

25620144 is a wasteful number, since it uses less digits than its factorization.

25620144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48545 (or 48539 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 25620144 is about 5061.6345186116. The cubic root of 25620144 is about 294.7998028850.

Adding to 25620144 its reverse (44102652), we get a palindrome (69722796).

The spelling of 25620144 in words is "twenty-five million, six hundred twenty thousand, one hundred forty-four".