2840987391 has 16 divisors (see below), whose sum is σ = 4244032128. Its totient is φ = 1675274400.

The previous prime is 2840987363. The next prime is 2840987417. The reversal of 2840987391 is 1937890482.

It is not a de Polignac number, because 2840987391 - 2⁶ = 2840987327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2840987341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1162165 + ... + 1164606.

It is an arithmetic number, because the mean of its divisors is an integer number (265252008).

Almost surely, 2^2840987391 is an apocalyptic number.

2840987391 is a deficient number, since it is larger than the sum of its proper divisors (1403044737).

2840987391 is a wasteful number, since it uses less digits than its factorization.

2840987391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2326822.

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 2840987391 is about 53300.9136038023. The cubic root of 2840987391 is about 1416.3038489995.

The spelling of 2840987391 in words is "two billion, eight hundred forty million, nine hundred eighty-seven thousand, three hundred ninety-one".