25198950 has 96 divisors (see below), whose sum is σ = 72423936. Its totient is φ = 5679360.

The previous prime is 25198949. The next prime is 25198963. The reversal of 25198950 is 5989152.

It is a super-2 number, since 2×25198950² = 1269974162205000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25198899 and 25198908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 108034 + ... + 108266.

It is an arithmetic number, because the mean of its divisors is an integer number (754416).

Almost surely, 2^25198950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25198950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36211968).

25198950 is an abundant number, since it is smaller than the sum of its proper divisors (47224986).

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

25198950 is a wasteful number, since it uses less digits than its factorization.

25198950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 353 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 39.

The square root of 25198950 is about 5019.8555756117. The cubic root of 25198950 is about 293.1753697824.

The spelling of 25198950 in words is "twenty-five million, one hundred ninety-eight thousand, nine hundred fifty".