25697298 has 32 divisors (see below), whose sum is σ = 56754432. Its totient is φ = 7691600.

The previous prime is 25697293. The next prime is 25697299. The reversal of 25697298 is 89279652.

It is a super-2 number, since 2×25697298² = 1320702249001608, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25697293) 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, 3133 + ... + 7823.

It is an arithmetic number, because the mean of its divisors is an integer number (1773576).

Almost surely, 2^25697298 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25697298, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28377216).

25697298 is an abundant number, since it is smaller than the sum of its proper divisors (31057134).

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

25697298 is a wasteful number, since it uses less digits than its factorization.

25697298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4790.

The product of its digits is 544320, while the sum is 48.

The square root of 25697298 is about 5069.2502404202. The cubic root of 25697298 is about 295.0954321141.

The spelling of 25697298 in words is "twenty-five million, six hundred ninety-seven thousand, two hundred ninety-eight".