1218035958 has 16 divisors (see below), whose sum is σ = 2579370480. Its totient is φ = 382128896.

The previous prime is 1218035957. The next prime is 1218035963. The reversal of 1218035958 is 8595308121.

It is a super-2 number, since 2×1218035958² = 2967223189961955528, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218035953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5970663 + ... + 5970866.

It is an arithmetic number, because the mean of its divisors is an integer number (161210655).

Almost surely, 2^1218035958 is an apocalyptic number.

1218035958 is an abundant number, since it is smaller than the sum of its proper divisors (1361334522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1218035958 is a wasteful number, since it uses less digits than its factorization.

1218035958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11941551.

The product of its (nonzero) digits is 86400, while the sum is 42.

The square root of 1218035958 is about 34900.3718891361. The cubic root of 1218035958 is about 1067.9560240137.

The spelling of 1218035958 in words is "one billion, two hundred eighteen million, thirty-five thousand, nine hundred fifty-eight".