25441978 has 8 divisors (see below), whose sum is σ = 38184372. Its totient is φ = 12713856.

The previous prime is 25441973. The next prime is 25441991. The reversal of 25441978 is 87914452.

It can be written as a sum of positive squares in 2 ways, for example, as 25331089 + 110889 = 5033^2 + 333^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 25441978.

It is not an unprimeable number, because it can be changed into a prime (25441973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5226 + ... + 8842.

Almost surely, 2^25441978 is an apocalyptic number.

25441978 is a deficient number, since it is larger than the sum of its proper divisors (12742394).

25441978 is a wasteful number, since it uses less digits than its factorization.

25441978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7136.

The product of its digits is 80640, while the sum is 40.

The square root of 25441978 is about 5044.0041633607. The cubic root of 25441978 is about 294.1148532393.

The spelling of 25441978 in words is "twenty-five million, four hundred forty-one thousand, nine hundred seventy-eight".