4239457891 has 8 divisors (see below), whose sum is σ = 4354861104. Its totient is φ = 4124098080.

The previous prime is 4239457889. The next prime is 4239457913. The reversal of 4239457891 is 1987549324.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4239457891 - 2¹ = 4239457889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4239457801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333156 + ... + 345646.

It is an arithmetic number, because the mean of its divisors is an integer number (544357638).

Almost surely, 2^4239457891 is an apocalyptic number.

4239457891 is a deficient number, since it is larger than the sum of its proper divisors (115403213).

4239457891 is a wasteful number, since it uses less digits than its factorization.

4239457891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21701.

The product of its digits is 2177280, while the sum is 52.

The square root of 4239457891 is about 65111.1195649407. The cubic root of 4239457891 is about 1618.4654842483.

The spelling of 4239457891 in words is "four billion, two hundred thirty-nine million, four hundred fifty-seven thousand, eight hundred ninety-one".