1908061218 has 64 divisors (see below), whose sum is σ = 4852512000. Its totient is φ = 544413312.

The previous prime is 1908061213. The next prime is 1908061219. The reversal of 1908061218 is 8121608091.

It is a super-2 number, since 2×1908061218² = 7281395223271287048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1908061213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 310318 + ... + 316406.

It is an arithmetic number, because the mean of its divisors is an integer number (75820500).

Almost surely, 2^1908061218 is an apocalyptic number.

1908061218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1908061218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2426256000).

1908061218 is an abundant number, since it is smaller than the sum of its proper divisors (2944450782).

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

1908061218 is a wasteful number, since it uses less digits than its factorization.

1908061218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6936 (or 6930 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The square root of 1908061218 is about 43681.3600749794. The cubic root of 1908061218 is about 1240.3114934584.

The spelling of 1908061218 in words is "one billion, nine hundred eight million, sixty-one thousand, two hundred eighteen".