1218994830 has 24 divisors (see below), whose sum is σ = 3169386792. Its totient is φ = 325065264.

The previous prime is 1218994823. The next prime is 1218994841. The reversal of 1218994830 is 384998121.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6772104 + ... + 6772283.

It is an arithmetic number, because the mean of its divisors is an integer number (132057783).

Almost surely, 2^1218994830 is an apocalyptic number.

1218994830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1218994830 is an abundant number, since it is smaller than the sum of its proper divisors (1950391962).

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

1218994830 is a wasteful number, since it uses less digits than its factorization.

1218994830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13544400 (or 13544397 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 1218994830 is about 34914.1064614290. The cubic root of 1218994830 is about 1068.2361921329.

The spelling of 1218994830 in words is "one billion, two hundred eighteen million, nine hundred ninety-four thousand, eight hundred thirty".