25399416 has 64 divisors (see below), whose sum is σ = 74926080. Its totient is φ = 7021440.

The previous prime is 25399399. The next prime is 25399421. The reversal of 25399416 is 61499352.

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, 2770 + ... + 7646.

It is an arithmetic number, because the mean of its divisors is an integer number (1170720).

Almost surely, 2^25399416 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 25399416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37463040).

25399416 is an abundant number, since it is smaller than the sum of its proper divisors (49526664).

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

25399416 is a wasteful number, since it uses less digits than its factorization.

25399416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4924 (or 4920 counting only the distinct ones).

The product of its digits is 58320, while the sum is 39.

The square root of 25399416 is about 5039.7833286759. The cubic root of 25399416 is about 293.9507530081.

The spelling of 25399416 in words is "twenty-five million, three hundred ninety-nine thousand, four hundred sixteen".