25774240 has 48 divisors (see below), whose sum is σ = 62392680. Its totient is φ = 10055680.

The previous prime is 25774213. The next prime is 25774289. The reversal of 25774240 is 4247752.

It can be written as a sum of positive squares in 4 ways, for example, as 8832784 + 16941456 = 2972^2 + 4116^2 .

It is a super-2 number, since 2×25774240² = 1328622895155200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4596 + ... + 8524.

Almost surely, 2^25774240 is an apocalyptic number.

25774240 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 25774240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31196340).

25774240 is an abundant number, since it is smaller than the sum of its proper divisors (36618440).

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

25774240 is a wasteful number, since it uses less digits than its factorization.

25774240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3985 (or 3977 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 31.

The square root of 25774240 is about 5076.8336588862. The cubic root of 25774240 is about 295.3896603149.

The spelling of 25774240 in words is "twenty-five million, seven hundred seventy-four thousand, two hundred forty".