1219861008 has 60 divisors (see below), whose sum is σ = 3416285808. Its totient is φ = 406338240.

The previous prime is 1219860991. The next prime is 1219861021. The reversal of 1219861008 is 8001689121.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 362791 + ... + 366137.

Almost surely, 2^1219861008 is an apocalyptic number.

1219861008 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1219861008 is an abundant number, since it is smaller than the sum of its proper divisors (2196424800).

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

1219861008 is a wasteful number, since it uses less digits than its factorization.

1219861008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5892 (or 5883 counting only the distinct ones).

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

The square root of 1219861008 is about 34926.5086717811. The cubic root of 1219861008 is about 1068.4891501695.

The spelling of 1219861008 in words is "one billion, two hundred nineteen million, eight hundred sixty-one thousand, eight".