1218920196 has 48 divisors (see below), whose sum is σ = 3243106944. Its totient is φ = 352989696.

The previous prime is 1218920189. The next prime is 1218920207. The reversal of 1218920196 is 6910298121.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 227160 + ... + 232463.

It is an arithmetic number, because the mean of its divisors is an integer number (67564728).

Almost surely, 2^1218920196 is an apocalyptic number.

It is an amenable number.

1218920196 is an abundant number, since it is smaller than the sum of its proper divisors (2024186748).

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

1218920196 is a wasteful number, since it uses less digits than its factorization.

1218920196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459660 (or 459658 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 1218920196 is about 34913.0376220689. The cubic root of 1218920196 is about 1068.2143904634.

It can be divided in two parts, 12189 and 20196, that added together give a triangular number (32385 = T₂₅₄).

The spelling of 1218920196 in words is "one billion, two hundred eighteen million, nine hundred twenty thousand, one hundred ninety-six".