25684416 has 168 divisors, whose sum is σ = 81070704. Its totient is φ = 7741440.

The previous prime is 25684403. The next prime is 25684423. The reversal of 25684416 is 61448652.

It is a super-2 number, since 2×25684416² = 1319378450522112, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 421026 + ... + 421086.

Almost surely, 2^25684416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25684416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40535352).

25684416 is an abundant number, since it is smaller than the sum of its proper divisors (55386288).

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

25684416 is a wasteful number, since it uses less digits than its factorization.

25684416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139 (or 126 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 25684416 is about 5067.9794790429. The cubic root of 25684416 is about 295.0461136378.

The spelling of 25684416 in words is "twenty-five million, six hundred eighty-four thousand, four hundred sixteen".