1018156394 has 16 divisors (see below), whose sum is σ = 1589165568. Its totient is φ = 488843472.

The previous prime is 1018156393. The next prime is 1018156411. The reversal of 1018156394 is 4936518101.

It is not an unprimeable number, because it can be changed into a prime (1018156393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97202 + ... + 107165.

It is an arithmetic number, because the mean of its divisors is an integer number (99322848).

Almost surely, 2^1018156394 is an apocalyptic number.

1018156394 is a deficient number, since it is larger than the sum of its proper divisors (571009174).

1018156394 is a wasteful number, since it uses less digits than its factorization.

1018156394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204469.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 1018156394 is about 31908.5630199794. The cubic root of 1018156394 is about 1006.0158680917.

The spelling of 1018156394 in words is "one billion, eighteen million, one hundred fifty-six thousand, three hundred ninety-four".