1286423424 has 512 divisors, whose sum is σ = 4729536000. Its totient is φ = 338411520.

The previous prime is 1286423393. The next prime is 1286423429. The reversal of 1286423424 is 4243246821.

1286423424 is a `hidden beast` number, since 1 + 2 + 8 + 642 + 3 + 4 + 2 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1286423429) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9389884 + ... + 9390020.

It is an arithmetic number, because the mean of its divisors is an integer number (9237375).

Almost surely, 2^1286423424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1286423424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2364768000).

1286423424 is an abundant number, since it is smaller than the sum of its proper divisors (3443112576).

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

1286423424 is a wasteful number, since it uses less digits than its factorization.

1286423424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203 (or 185 counting only the distinct ones).

The product of its digits is 73728, while the sum is 36.

The square root of 1286423424 is about 35866.7453778566. The cubic root of 1286423424 is about 1087.5802518660.

The spelling of 1286423424 in words is "one billion, two hundred eighty-six million, four hundred twenty-three thousand, four hundred twenty-four".