2991485256 has 64 divisors (see below), whose sum is σ = 7745803200. Its totient is φ = 961632000.

The previous prime is 2991485243. The next prime is 2991485269. The reversal of 2991485256 is 6525841992.

It is an interprime number because it is at equal distance from previous prime (2991485243) and next prime (2991485269).

It is a junction number, because it is equal to n+sod(n) for n = 2991485199 and 2991485208.

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, 736431 + ... + 740481.

It is an arithmetic number, because the mean of its divisors is an integer number (121028175).

Almost surely, 2^2991485256 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 2991485256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3872901600).

2991485256 is an abundant number, since it is smaller than the sum of its proper divisors (4754317944).

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

2991485256 is a wasteful number, since it uses less digits than its factorization.

2991485256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5150 (or 5146 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 51.

The square root of 2991485256 is about 54694.4718961615. The cubic root of 2991485256 is about 1440.8837900307.

The spelling of 2991485256 in words is "two billion, nine hundred ninety-one million, four hundred eighty-five thousand, two hundred fifty-six".