25898445 has 24 divisors (see below), whose sum is σ = 45009432. Its totient is φ = 13776000.

The previous prime is 25898443. The next prime is 25898447. The reversal of 25898445 is 54489852.

It is an interprime number because it is at equal distance from previous prime (25898443) and next prime (25898447).

It can be written as a sum of positive squares in 4 ways, for example, as 4052169 + 21846276 = 2013^2 + 4674^2 .

It is not a de Polignac number, because 25898445 - 2¹ = 25898443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25898445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25898441) 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, 31135 + ... + 31955.

It is an arithmetic number, because the mean of its divisors is an integer number (1875393).

Almost surely, 2^25898445 is an apocalyptic number.

It is an amenable number.

25898445 is a deficient number, since it is larger than the sum of its proper divisors (19110987).

25898445 is a wasteful number, since it uses less digits than its factorization.

25898445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533 (or 1530 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The square root of 25898445 is about 5089.0514833316. The cubic root of 25898445 is about 295.8633903645.

It can be divided in two parts, 25 and 898445, that added together give a triangular number (898470 = T₁₃₄₀).

The spelling of 25898445 in words is "twenty-five million, eight hundred ninety-eight thousand, four hundred forty-five".