25817340 has 24 divisors (see below), whose sum is σ = 72288720. Its totient is φ = 6884608.

The previous prime is 25817321. The next prime is 25817347. The reversal of 25817340 is 4371852.

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 = 25817298 and 25817307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25817347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215085 + ... + 215204.

It is an arithmetic number, because the mean of its divisors is an integer number (3012030).

Almost surely, 2^25817340 is an apocalyptic number.

25817340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25817340 is an abundant number, since it is smaller than the sum of its proper divisors (46471380).

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

25817340 is a wasteful number, since it uses less digits than its factorization.

25817340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430301 (or 430299 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 25817340 is about 5081.0766575599. The cubic root of 25817340 is about 295.5542200261.

The spelling of 25817340 in words is "twenty-five million, eight hundred seventeen thousand, three hundred forty".