25857738 has 32 divisors (see below), whose sum is σ = 58032000. Its totient is φ = 8533728.

The previous prime is 25857707. The next prime is 25857761. The reversal of 25857738 is 83775852.

It is a super-2 number, since 2×25857738² = 1337245228953288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25857693 and 25857702.

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, 3238 + ... + 7886.

It is an arithmetic number, because the mean of its divisors is an integer number (1813500).

Almost surely, 2^25857738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25857738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29016000).

25857738 is an abundant number, since it is smaller than the sum of its proper divisors (32174262).

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

25857738 is a wasteful number, since it uses less digits than its factorization.

25857738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4763 (or 4757 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The square root of 25857738 is about 5085.0504422277. The cubic root of 25857738 is about 295.7082970552.

The spelling of 25857738 in words is "twenty-five million, eight hundred fifty-seven thousand, seven hundred thirty-eight".