25698552 has 64 divisors (see below), whose sum is σ = 70536960. Its totient is φ = 7737600.

The previous prime is 25698551. The next prime is 25698557. The reversal of 25698552 is 25589652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25698551) 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, 81948 + ... + 82260.

It is an arithmetic number, because the mean of its divisors is an integer number (1102140).

Almost surely, 2^25698552 is an apocalyptic number.

25698552 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25698552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35268480).

25698552 is an abundant number, since it is smaller than the sum of its proper divisors (44838408).

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

25698552 is a wasteful number, since it uses less digits than its factorization.

25698552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644 (or 640 counting only the distinct ones).

The product of its digits is 216000, while the sum is 42.

The square root of 25698552 is about 5069.3739258413. The cubic root of 25698552 is about 295.1002321473.

Subtracting from 25698552 its reverse (25589652), we obtain a square (108900 = 330²).

The spelling of 25698552 in words is "twenty-five million, six hundred ninety-eight thousand, five hundred fifty-two".