1086431643 has 16 divisors (see below), whose sum is σ = 1755849600. Its totient is φ = 658443240.

The previous prime is 1086431641. The next prime is 1086431651. The reversal of 1086431643 is 3461346801.

It is a happy number.

1086431643 is a `hidden beast` number, since 1 + 0 + 8 + 6 + 4 + 3 + 1 + 643 = 666.

It is not a de Polignac number, because 1086431643 - 2¹ = 1086431641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1086431598 and 1086431607.

It is not an unprimeable number, because it can be changed into a prime (1086431641) 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, 1828713 + ... + 1829306.

It is an arithmetic number, because the mean of its divisors is an integer number (109740600).

Almost surely, 2^1086431643 is an apocalyptic number.

1086431643 is a deficient number, since it is larger than the sum of its proper divisors (669417957).

1086431643 is a wasteful number, since it uses less digits than its factorization.

1086431643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3658039 (or 3658033 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 1086431643 is about 32961.0625283834. The cubic root of 1086431643 is about 1028.0181967109.

The spelling of 1086431643 in words is "one billion, eighty-six million, four hundred thirty-one thousand, six hundred forty-three".