25163940 has 96 divisors (see below), whose sum is σ = 74059776. Its totient is φ = 6376320.

The previous prime is 25163917. The next prime is 25163951. The reversal of 25163940 is 4936152.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 25163898 and 25163907.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154299 + ... + 154461.

It is an arithmetic number, because the mean of its divisors is an integer number (771456).

Almost surely, 2^25163940 is an apocalyptic number.

25163940 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 25163940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37029888).

25163940 is an abundant number, since it is smaller than the sum of its proper divisors (48895836).

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

25163940 is a wasteful number, since it uses less digits than its factorization.

25163940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 25163940 is about 5016.3672114390. The cubic root of 25163940 is about 293.0395330801.

The spelling of 25163940 in words is "twenty-five million, one hundred sixty-three thousand, nine hundred forty".