25855140 has 48 divisors (see below), whose sum is σ = 73398528. Its totient is φ = 6799104.

The previous prime is 25855129. The next prime is 25855171. The reversal of 25855140 is 4155852.

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 = 25855098 and 25855107.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1429 + ... + 7331.

It is an arithmetic number, because the mean of its divisors is an integer number (1529136).

Almost surely, 2^25855140 is an apocalyptic number.

25855140 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 25855140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36699264).

25855140 is an abundant number, since it is smaller than the sum of its proper divisors (47543388).

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

25855140 is a wasteful number, since it uses less digits than its factorization.

25855140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5988 (or 5986 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 25855140 is about 5084.7949811177. The cubic root of 25855140 is about 295.6983931741.

The spelling of 25855140 in words is "twenty-five million, eight hundred fifty-five thousand, one hundred forty".