25409898 has 24 divisors (see below), whose sum is σ = 56544228. Its totient is φ = 8240832.

The previous prime is 25409837. The next prime is 25409899. The reversal of 25409898 is 89890452.

It can be written as a sum of positive squares in 2 ways, for example, as 22496049 + 2913849 = 4743^2 + 1707^2 .

It is not an unprimeable number, because it can be changed into a prime (25409899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18411 + ... + 19742.

Almost surely, 2^25409898 is an apocalyptic number.

25409898 is an abundant number, since it is smaller than the sum of its proper divisors (31134330).

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

25409898 is a wasteful number, since it uses less digits than its factorization.

25409898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38198 (or 38195 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 25409898 is about 5040.8231470664. The cubic root of 25409898 is about 293.9911839644.

The spelling of 25409898 in words is "twenty-five million, four hundred nine thousand, eight hundred ninety-eight".