1915944920 has 16 divisors (see below), whose sum is σ = 4310876160. Its totient is φ = 766377952.

The previous prime is 1915944917. The next prime is 1915944949. The reversal of 1915944920 is 294495191.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23949272 + ... + 23949351.

It is an arithmetic number, because the mean of its divisors is an integer number (269429760).

Almost surely, 2^1915944920 is an apocalyptic number.

1915944920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1915944920 is an abundant number, since it is smaller than the sum of its proper divisors (2394931240).

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

1915944920 is a wasteful number, since it uses less digits than its factorization.

1915944920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47898634 (or 47898630 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 1915944920 is about 43771.5080845977. The cubic root of 1915944920 is about 1242.0173803430.

The spelling of 1915944920 in words is "one billion, nine hundred fifteen million, nine hundred forty-four thousand, nine hundred twenty".