3257861238 has 48 divisors (see below), whose sum is σ = 7323264000. Its totient is φ = 1045606320.

The previous prime is 3257861237. The next prime is 3257861261. The reversal of 3257861238 is 8321687523.

3257861238 is a `hidden beast` number, since 3 + 25 + 7 + 8 + 612 + 3 + 8 = 666.

It is a super-2 number, since 2×3257861238² = 21227319692125785288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3257861193 and 3257861202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3257861237) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96373 + ... + 125711.

It is an arithmetic number, because the mean of its divisors is an integer number (152568000).

Almost surely, 2^3257861238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3257861238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3661632000).

3257861238 is an abundant number, since it is smaller than the sum of its proper divisors (4065402762).

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

3257861238 is a wasteful number, since it uses less digits than its factorization.

3257861238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29577 (or 29574 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 3257861238 is about 57077.6772302448. The cubic root of 3257861238 is about 1482.4413744333.

The spelling of 3257861238 in words is "three billion, two hundred fifty-seven million, eight hundred sixty-one thousand, two hundred thirty-eight".