25839216 has 160 divisors (see below), whose sum is σ = 82494720. Its totient is φ = 7693056.

The previous prime is 25839211. The next prime is 25839223. The reversal of 25839216 is 61293852.

25839216 is a `hidden beast` number, since 258 + 392 + 16 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

Its product of digits (25920) is a multiple of the sum of its prime factors (180).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25839211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 241435 + ... + 241541.

It is an arithmetic number, because the mean of its divisors is an integer number (515592).

Almost surely, 2^25839216 is an apocalyptic number.

25839216 is a gapful number since it is divisible by the number (26) 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 25839216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41247360).

25839216 is an abundant number, since it is smaller than the sum of its proper divisors (56655504).

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

25839216 is a wasteful number, since it uses less digits than its factorization.

25839216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180 (or 168 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 25839216 is about 5083.2288951020. The cubic root of 25839216 is about 295.6376745159.

The spelling of 25839216 in words is "twenty-five million, eight hundred thirty-nine thousand, two hundred sixteen".