840011427 has 12 divisors (see below), whose sum is σ = 1213727944. Its totient is φ = 559833120.

The previous prime is 840011323. The next prime is 840011507. The reversal of 840011427 is 724110048.

It is not a de Polignac number, because 840011427 - 2⁸ = 840011171 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 840011427.

It is not an unprimeable number, because it can be changed into a prime (840011027) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 20352 + ... + 45762.

Almost surely, 2^840011427 is an apocalyptic number.

840011427 is a deficient number, since it is larger than the sum of its proper divisors (373716517).

840011427 is a wasteful number, since it uses less digits than its factorization.

840011427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29090 (or 29087 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 840011427 is about 28982.9506261871. The cubic root of 840011427 is about 943.5430745430.

The spelling of 840011427 in words is "eight hundred forty million, eleven thousand, four hundred twenty-seven".