2091294288 has 50 divisors (see below), whose sum is σ = 6052816154. Its totient is φ = 697097664.

The previous prime is 2091294269. The next prime is 2091294319. The reversal of 2091294288 is 8824921902.

It is a happy number.

2091294288 is a `hidden beast` number, since 209 + 12 + 9 + 428 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1461685824 + 629608464 = 38232^2 + 25092^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 805531 + ... + 808122.

Almost surely, 2^2091294288 is an apocalyptic number.

It is an amenable number.

2091294288 is an abundant number, since it is smaller than the sum of its proper divisors (3961521866).

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

2091294288 is a wasteful number, since it uses less digits than its factorization.

2091294288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1613673 (or 1613658 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 2091294288 is about 45730.6711955991. The cubic root of 2091294288 is about 1278.8071341248.

The spelling of 2091294288 in words is "two billion, ninety-one million, two hundred ninety-four thousand, two hundred eighty-eight".