1219891048 has 32 divisors (see below), whose sum is σ = 2429020800. Its totient is φ = 572721408.

The previous prime is 1219891033. The next prime is 1219891051. The reversal of 1219891048 is 8401989121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1219890995 and 1219891013.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18336 + ... + 52687.

It is an arithmetic number, because the mean of its divisors is an integer number (75906900).

Almost surely, 2^1219891048 is an apocalyptic number.

It is an amenable number.

1219891048 is a deficient number, since it is larger than the sum of its proper divisors (1209129752).

1219891048 is a wasteful number, since it uses less digits than its factorization.

1219891048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71161 (or 71157 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 43.

The square root of 1219891048 is about 34926.9387149804. The cubic root of 1219891048 is about 1068.4979208820.

The spelling of 1219891048 in words is "one billion, two hundred nineteen million, eight hundred ninety-one thousand, forty-eight".