1138423858 has 16 divisors (see below), whose sum is σ = 2006174016. Its totient is φ = 477660240.

The previous prime is 1138423849. The next prime is 1138423879. The reversal of 1138423858 is 8583248311.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1989966 + ... + 1990537.

It is an arithmetic number, because the mean of its divisors is an integer number (125385876).

Almost surely, 2^1138423858 is an apocalyptic number.

1138423858 is a deficient number, since it is larger than the sum of its proper divisors (867750158).

1138423858 is a wasteful number, since it uses less digits than its factorization.

1138423858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3980529.

The product of its digits is 184320, while the sum is 43.

The square root of 1138423858 is about 33740.5373104816. The cubic root of 1138423858 is about 1044.1622699331.

The spelling of 1138423858 in words is "one billion, one hundred thirty-eight million, four hundred twenty-three thousand, eight hundred fifty-eight".