1915939872 has 384 divisors, whose sum is σ = 7199539200. Its totient is φ = 481075200.

The previous prime is 1915939849. The next prime is 1915939891. The reversal of 1915939872 is 2789395191.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 2061904 + ... + 2062832.

It is an arithmetic number, because the mean of its divisors is an integer number (18748800).

Almost surely, 2^1915939872 is an apocalyptic number.

1915939872 is a gapful number since it is divisible by the number (12) 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 1915939872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3599769600).

1915939872 is an abundant number, since it is smaller than the sum of its proper divisors (5283599328).

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

1915939872 is a wasteful number, since it uses less digits than its factorization.

1915939872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997 (or 983 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 54.

The square root of 1915939872 is about 43771.4504214791. The cubic root of 1915939872 is about 1242.0162895481.

The spelling of 1915939872 in words is "one billion, nine hundred fifteen million, nine hundred thirty-nine thousand, eight hundred seventy-two".