1912961220 has 192 divisors, whose sum is σ = 5737132800. Its totient is φ = 475453440.

The previous prime is 1912961213. The next prime is 1912961233. The reversal of 1912961220 is 221692191.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7111246 + ... + 7111514.

It is an arithmetic number, because the mean of its divisors is an integer number (29880900).

Almost surely, 2^1912961220 is an apocalyptic number.

1912961220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1912961220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2868566400).

1912961220 is an abundant number, since it is smaller than the sum of its proper divisors (3824171580).

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

1912961220 is a wasteful number, since it uses less digits than its factorization.

1912961220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438 (or 436 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 1912961220 is about 43737.4121319495. The cubic root of 1912961220 is about 1241.3723143726.

The spelling of 1912961220 in words is "one billion, nine hundred twelve million, nine hundred sixty-one thousand, two hundred twenty".