8424920871 has 24 divisors (see below), whose sum is σ = 12774827520. Its totient is φ = 5343296400.

The previous prime is 8424920851. The next prime is 8424920879. The reversal of 8424920871 is 1780294248.

8424920871 is a `hidden beast` number, since 84 + 2 + 492 + 0 + 87 + 1 = 666.

It is not a de Polignac number, because 8424920871 - 2⁵ = 8424920839 is a prime.

It is a super-2 number, since 2×8424920871² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8424920879) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 239445 + ... + 272366.

It is an arithmetic number, because the mean of its divisors is an integer number (532284480).

Almost surely, 2^8424920871 is an apocalyptic number.

8424920871 is a deficient number, since it is larger than the sum of its proper divisors (4349906649).

8424920871 is a wasteful number, since it uses less digits than its factorization.

8424920871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511907 (or 511904 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 8424920871 is about 91787.3677092878. The cubic root of 8424920871 is about 2034.8010052788.

The spelling of 8424920871 in words is "eight billion, four hundred twenty-four million, nine hundred twenty thousand, eight hundred seventy-one".