1006138858 has 8 divisors (see below), whose sum is σ = 1509933600. Its totient is φ = 502827660.

The previous prime is 1006138801. The next prime is 1006138879. The reversal of 1006138858 is 8588316001.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1006138858.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115638 + ... + 124033.

It is an arithmetic number, because the mean of its divisors is an integer number (188741700).

Almost surely, 2^1006138858 is an apocalyptic number.

1006138858 is a deficient number, since it is larger than the sum of its proper divisors (503794742).

1006138858 is a wasteful number, since it uses less digits than its factorization.

1006138858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241772.

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 1006138858 is about 31719.6919594122. The cubic root of 1006138858 is about 1002.0421129361.

The spelling of 1006138858 in words is "one billion, six million, one hundred thirty-eight thousand, eight hundred fifty-eight".