25198000 has 80 divisors (see below), whose sum is σ = 62558496. Its totient is φ = 9811200.

The previous prime is 25197979. The next prime is 25198021. The reversal of 25198000 is 89152.

It is an interprime number because it is at equal distance from previous prime (25197979) and next prime (25198021).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85854 + ... + 86146.

Almost surely, 2^25198000 is an apocalyptic number.

25198000 is a gapful number since it is divisible by the number (20) 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 25198000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31279248).

25198000 is an abundant number, since it is smaller than the sum of its proper divisors (37360496).

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

25198000 is a wasteful number, since it uses less digits than its factorization.

25198000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359 (or 343 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 25198000 is about 5019.7609504836. The cubic root of 25198000 is about 293.1716855006.

It can be divided in two parts, 25 and 198000, that added together give a square (198025 = 445²).

The spelling of 25198000 in words is "twenty-five million, one hundred ninety-eight thousand".