25842840 has 64 divisors (see below), whose sum is σ = 80040960. Its totient is φ = 6668160.

The previous prime is 25842829. The next prime is 25842851. The reversal of 25842840 is 4824852.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25842829) and next prime (25842851).

It is a congruent number.

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, 247 + ... + 7193.

It is an arithmetic number, because the mean of its divisors is an integer number (1250640).

Almost surely, 2^25842840 is an apocalyptic number.

25842840 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 25842840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40020480).

25842840 is an abundant number, since it is smaller than the sum of its proper divisors (54198120).

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

25842840 is a wasteful number, since it uses less digits than its factorization.

25842840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6992 (or 6988 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 33.

The square root of 25842840 is about 5083.5853489442. The cubic root of 25842840 is about 295.6514951216.

The spelling of 25842840 in words is "twenty-five million, eight hundred forty-two thousand, eight hundred forty".