25722378 has 48 divisors (see below), whose sum is σ = 61248096. Its totient is φ = 7737120.

The previous prime is 25722313. The next prime is 25722401. The reversal of 25722378 is 87322752.

It is a happy number.

25722378 is a nontrivial binomial coefficient, being equal to C(7173, 2).

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 23 ways as a sum of consecutive naturals, for example, 31876 + ... + 32672.

It is an arithmetic number, because the mean of its divisors is an integer number (1276002).

Almost surely, 2^25722378 is an apocalyptic number.

25722378 is the 7172-nd triangular number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25722378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30624048).

25722378 is an abundant number, since it is smaller than the sum of its proper divisors (35525718).

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

25722378 is a wasteful number, since it uses less digits than its factorization.

25722378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979 (or 976 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 25722378 is about 5071.7233757373. The cubic root of 25722378 is about 295.1914031251.

It can be divided in two parts, 2572 and 2378, that added together give a triangular number (4950 = T₉₉).

The spelling of 25722378 in words is "twenty-five million, seven hundred twenty-two thousand, three hundred seventy-eight".