1018378834 has 36 divisors (see below), whose sum is σ = 1772237502. Its totient is φ = 438498720.

The previous prime is 1018378831. The next prime is 1018378873. The reversal of 1018378834 is 4388738101.

It can be written as a sum of positive squares in only one way, i.e., 772673209 + 245705625 = 27797^2 + 15675^2 .

It is not an unprimeable number, because it can be changed into a prime (1018378831) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 81534 + ... + 93190.

Almost surely, 2^1018378834 is an apocalyptic number.

1018378834 is a deficient number, since it is larger than the sum of its proper divisors (753858668).

1018378834 is a wasteful number, since it uses less digits than its factorization.

1018378834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11719 (or 11689 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 1018378834 is about 31912.0484143528. The cubic root of 1018378834 is about 1006.0891252967.

The spelling of 1018378834 in words is "one billion, eighteen million, three hundred seventy-eight thousand, eight hundred thirty-four".