2287691940 has 48 divisors (see below), whose sum is σ = 6408517248. Its totient is φ = 609767424.

The previous prime is 2287691933. The next prime is 2287691953. The reversal of 2287691940 is 491967822.

It is a self number, because there is not a number n which added to its sum of digits gives 2287691940.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142564 + ... + 157796.

It is an arithmetic number, because the mean of its divisors is an integer number (133510776).

Almost surely, 2^2287691940 is an apocalyptic number.

2287691940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2287691940 is an abundant number, since it is smaller than the sum of its proper divisors (4120825308).

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

2287691940 is a wasteful number, since it uses less digits than its factorization.

2287691940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17748 (or 17746 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 2287691940 is about 47829.8227050864. The cubic root of 2287691940 is about 1317.6473128790.

The spelling of 2287691940 in words is "two billion, two hundred eighty-seven million, six hundred ninety-one thousand, nine hundred forty".