840580389 has 16 divisors (see below), whose sum is σ = 1358514240. Its totient is φ = 509442480.

The previous prime is 840580381. The next prime is 840580409. The reversal of 840580389 is 983085048.

It is not a de Polignac number, because 840580389 - 2³ = 840580381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840580381) 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, 1414822 + ... + 1415415.

It is an arithmetic number, because the mean of its divisors is an integer number (84907140).

Almost surely, 2^840580389 is an apocalyptic number.

It is an amenable number.

840580389 is a deficient number, since it is larger than the sum of its proper divisors (517933851).

840580389 is a wasteful number, since it uses less digits than its factorization.

840580389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2830257 (or 2830251 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 840580389 is about 28992.7644249389. The cubic root of 840580389 is about 943.7560553739.

The spelling of 840580389 in words is "eight hundred forty million, five hundred eighty thousand, three hundred eighty-nine".