25198488 has 144 divisors (see below), whose sum is σ = 83332080. Its totient is φ = 6736896.

The previous prime is 25198483. The next prime is 25198489. The reversal of 25198488 is 88489152.

It is a happy number.

It is a super-2 number, since 2×25198488² = 1269927594972288, which contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25198483) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 145570 + ... + 145742.

It is an arithmetic number, because the mean of its divisors is an integer number (578695).

Almost surely, 2^25198488 is an apocalyptic number.

25198488 is a gapful number since it is divisible by the number (28) 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 25198488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41666040).

25198488 is an abundant number, since it is smaller than the sum of its proper divisors (58133592).

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

25198488 is a wasteful number, since it uses less digits than its factorization.

25198488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226 (or 202 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The square root of 25198488 is about 5019.8095581406. The cubic root of 25198488 is about 293.1735780695.

The spelling of 25198488 in words is "twenty-five million, one hundred ninety-eight thousand, four hundred eighty-eight".