25999740 has 144 divisors (see below), whose sum is σ = 87325056. Its totient is φ = 6220800.

The previous prime is 25999717. The next prime is 25999751. The reversal of 25999740 is 4799952.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 95805 + ... + 96075.

It is an arithmetic number, because the mean of its divisors is an integer number (606424).

Almost surely, 2^25999740 is an apocalyptic number.

25999740 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 25999740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43662528).

25999740 is an abundant number, since it is smaller than the sum of its proper divisors (61325316).

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

25999740 is a wasteful number, since it uses less digits than its factorization.

25999740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340 (or 335 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 25999740 is about 5098.9940184315. The cubic root of 25999740 is about 296.2486193388.

It can be divided in two parts, 259 and 99740, that added together give a palindrome (99999).

The spelling of 25999740 in words is "twenty-five million, nine hundred ninety-nine thousand, seven hundred forty".