1949111220 has 96 divisors (see below), whose sum is σ = 6364512000. Its totient is φ = 445506432.

The previous prime is 1949111209. The next prime is 1949111239. The reversal of 1949111220 is 221119491.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26775 + ... + 67934.

It is an arithmetic number, because the mean of its divisors is an integer number (66297000).

Almost surely, 2^1949111220 is an apocalyptic number.

1949111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1949111220 is an abundant number, since it is smaller than the sum of its proper divisors (4415400780).

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

1949111220 is a wasteful number, since it uses less digits than its factorization.

1949111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94742 (or 94726 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 1949111220 is about 44148.7397328621. The cubic root of 1949111220 is about 1249.1431396999.

The spelling of 1949111220 in words is "one billion, nine hundred forty-nine million, one hundred eleven thousand, two hundred twenty".