25774720 has 128 divisors (see below), whose sum is σ = 68739840. Its totient is φ = 9191424.

The previous prime is 25774717. The next prime is 25774729. The reversal of 25774720 is 2747752.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (25774729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 250189 + ... + 250291.

It is an arithmetic number, because the mean of its divisors is an integer number (537030).

Almost surely, 2^25774720 is an apocalyptic number.

25774720 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 25774720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34369920).

25774720 is an abundant number, since it is smaller than the sum of its proper divisors (42965120).

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

25774720 is a wasteful number, since it uses less digits than its factorization.

25774720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 27440, while the sum is 34.

The square root of 25774720 is about 5076.8809322260. The cubic root of 25774720 is about 295.3914940083.

The spelling of 25774720 in words is "twenty-five million, seven hundred seventy-four thousand, seven hundred twenty".