1023158156 has 6 divisors (see below), whose sum is σ = 1790526780. Its totient is φ = 511579076.

The previous prime is 1023158153. The next prime is 1023158177. The reversal of 1023158156 is 6518513201.

It is a super-2 number, since 2×1023158156² = 2093705224378640672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1023158153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127894766 + ... + 127894773.

It is an arithmetic number, because the mean of its divisors is an integer number (298421130).

Almost surely, 2^1023158156 is an apocalyptic number.

It is an amenable number.

1023158156 is a deficient number, since it is larger than the sum of its proper divisors (767368624).

1023158156 is a wasteful number, since it uses less digits than its factorization.

1023158156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255789543 (or 255789541 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 1023158156 is about 31986.8434829072. The cubic root of 1023158156 is about 1007.6605514343.

The spelling of 1023158156 in words is "one billion, twenty-three million, one hundred fifty-eight thousand, one hundred fifty-six".