2891186480 has 320 divisors, whose sum is σ = 8927428608. Its totient is φ = 845475840.

The previous prime is 2891186477. The next prime is 2891186483. The reversal of 2891186480 is 846811982.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2891186477) and next prime (2891186483).

It is not an unprimeable number, because it can be changed into a prime (2891186483) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5190362 + ... + 5190918.

Almost surely, 2^2891186480 is an apocalyptic number.

2891186480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2891186480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4463714304).

2891186480 is an abundant number, since it is smaller than the sum of its proper divisors (6036242128).

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

2891186480 is a wasteful number, since it uses less digits than its factorization.

2891186480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644 (or 638 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 47.

The square root of 2891186480 is about 53769.7543234112. The cubic root of 2891186480 is about 1424.5970306141.

The spelling of 2891186480 in words is "two billion, eight hundred ninety-one million, one hundred eighty-six thousand, four hundred eighty".