25194240 has 180 divisors, whose sum is σ = 90520584. Its totient is φ = 6718464.

The previous prime is 25194217. The next prime is 25194263. The reversal of 25194240 is 4249152.

It is an interprime number because it is at equal distance from previous prime (25194217) and next prime (25194263).

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5038846 + ... + 5038850.

Almost surely, 2^25194240 is an apocalyptic number.

25194240 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 25194240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45260292).

25194240 is an abundant number, since it is smaller than the sum of its proper divisors (65326344).

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

25194240 is an frugal number, since it uses more digits than its factorization.

25194240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48 (or 10 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 25194240 is about 5019.3864166848. The cubic root of 25194240 is about 293.1571025922.

The spelling of 25194240 in words is "twenty-five million, one hundred ninety-four thousand, two hundred forty".