2891622240 has 336 divisors, whose sum is σ = 11036169648. Its totient is φ = 711410688.

The previous prime is 2891622203. The next prime is 2891622263. The reversal of 2891622240 is 422261982.

2891622240 is a `hidden beast` number, since 2 + 8 + 9 + 1 + 622 + 24 + 0 = 666.

It is a super-2 number, since 2×2891622240² = 16722958357725235200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2891622195 and 2891622204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1515367 + ... + 1517273.

It is an arithmetic number, because the mean of its divisors is an integer number (32845743).

Almost surely, 2^2891622240 is an apocalyptic number.

2891622240 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 2891622240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5518084824).

2891622240 is an abundant number, since it is smaller than the sum of its proper divisors (8144547408).

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

2891622240 is a wasteful number, since it uses less digits than its factorization.

2891622240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1953 (or 1930 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 2891622240 is about 53773.8062629009. The cubic root of 2891622240 is about 1424.6685988349.

The spelling of 2891622240 in words is "two billion, eight hundred ninety-one million, six hundred twenty-two thousand, two hundred forty".