1642727443 has 32 divisors (see below), whose sum is σ = 1994106240. Its totient is φ = 1324753920.

The previous prime is 1642727423. The next prime is 1642727447. The reversal of 1642727443 is 3447272461.

It is a de Polignac number, because none of the positive numbers 2^k-1642727443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1642727396 and 1642727405.

It is not an unprimeable number, because it can be changed into a prime (1642727447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14537355 + ... + 14537467.

It is an arithmetic number, because the mean of its divisors is an integer number (62315820).

Almost surely, 2^1642727443 is an apocalyptic number.

1642727443 is a deficient number, since it is larger than the sum of its proper divisors (351378797).

1642727443 is an frugal number, since it uses more digits than its factorization.

1642727443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 198 counting only the distinct ones).

The product of its digits is 225792, while the sum is 40.

The square root of 1642727443 is about 40530.5741755530. The cubic root of 1642727443 is about 1179.9270861295.

The spelling of 1642727443 in words is "one billion, six hundred forty-two million, seven hundred twenty-seven thousand, four hundred forty-three".