25533378 has 48 divisors (see below), whose sum is σ = 62724480. Its totient is φ = 7441632.

The previous prime is 25533377. The next prime is 25533401. The reversal of 25533378 is 87333552.

25533378 is a `hidden beast` number, since 2 + 553 + 33 + 78 = 666.

It is not an unprimeable number, because it can be changed into a prime (25533377) 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, 1575 + ... + 7317.

It is an arithmetic number, because the mean of its divisors is an integer number (1306760).

Almost surely, 2^25533378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25533378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31362240).

25533378 is an abundant number, since it is smaller than the sum of its proper divisors (37191102).

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

25533378 is a wasteful number, since it uses less digits than its factorization.

25533378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5783 (or 5780 counting only the distinct ones).

The product of its digits is 75600, while the sum is 36.

The square root of 25533378 is about 5053.0563028725. The cubic root of 25533378 is about 294.4666336771.

It can be divided in two parts, 255 and 33378, that added together give a palindrome (33633).

The spelling of 25533378 in words is "twenty-five million, five hundred thirty-three thousand, three hundred seventy-eight".