25720288 has 48 divisors (see below), whose sum is σ = 55928880. Its totient is φ = 11545600.

The previous prime is 25720273. The next prime is 25720307. The reversal of 25720288 is 88202752.

25720288 = T₂₁₅₇ + T₂₁₅₈ + ... + T₂₁₆₇.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 30918 + ... + 31738.

It is an arithmetic number, because the mean of its divisors is an integer number (1165185).

Almost surely, 2^25720288 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25720288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27964440).

25720288 is an abundant number, since it is smaller than the sum of its proper divisors (30208592).

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

25720288 is a wasteful number, since it uses less digits than its factorization.

25720288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931 (or 923 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 25720288 is about 5071.5173271911. The cubic root of 25720288 is about 295.1834079241.

The spelling of 25720288 in words is "twenty-five million, seven hundred twenty thousand, two hundred eighty-eight".