25321398 has 32 divisors (see below), whose sum is σ = 53986176. Its totient is φ = 7890048.

The previous prime is 25321397. The next prime is 25321409. The reversal of 25321398 is 89312352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25321393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15865 + ... + 17387.

It is an arithmetic number, because the mean of its divisors is an integer number (1687068).

Almost surely, 2^25321398 is an apocalyptic number.

25321398 is an abundant number, since it is smaller than the sum of its proper divisors (28664778).

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

25321398 is a wasteful number, since it uses less digits than its factorization.

25321398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708.

The product of its digits is 12960, while the sum is 33.

The square root of 25321398 is about 5032.0371620249. The cubic root of 25321398 is about 293.6494734939.

The spelling of 25321398 in words is "twenty-five million, three hundred twenty-one thousand, three hundred ninety-eight".