3287891256 has 128 divisors (see below), whose sum is σ = 9432702720. Its totient is φ = 946059264.

The previous prime is 3287891249. The next prime is 3287891263. The reversal of 3287891256 is 6521987823.

It is an interprime number because it is at equal distance from previous prime (3287891249) and next prime (3287891263).

It is a super-2 number, since 2×3287891256² = 21620457822562515072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 3287891199 and 3287891208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 862651 + ... + 866453.

It is an arithmetic number, because the mean of its divisors is an integer number (73692990).

Almost surely, 2^3287891256 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 3287891256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4716351360).

3287891256 is an abundant number, since it is smaller than the sum of its proper divisors (6144811464).

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

3287891256 is a wasteful number, since it uses less digits than its factorization.

3287891256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4005 (or 4001 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 51.

The square root of 3287891256 is about 57340.1365188469. The cubic root of 3287891256 is about 1486.9823549762.

The spelling of 3287891256 in words is "three billion, two hundred eighty-seven million, eight hundred ninety-one thousand, two hundred fifty-six".