1218858530 has 16 divisors (see below), whose sum is σ = 2197433664. Its totient is φ = 486768240.

The previous prime is 1218858499. The next prime is 1218858533. The reversal of 1218858530 is 358588121.

It is a super-2 number, since 2×1218858530² = 2971232232307521800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1218858533) 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, 90272 + ... + 102891.

It is an arithmetic number, because the mean of its divisors is an integer number (137339604).

Almost surely, 2^1218858530 is an apocalyptic number.

1218858530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1218858530 is a deficient number, since it is larger than the sum of its proper divisors (978575134).

1218858530 is a wasteful number, since it uses less digits than its factorization.

1218858530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193801.

The product of its (nonzero) digits is 76800, while the sum is 41.

The square root of 1218858530 is about 34912.1544737646. The cubic root of 1218858530 is about 1068.1963762626.

The spelling of 1218858530 in words is "one billion, two hundred eighteen million, eight hundred fifty-eight thousand, five hundred thirty".