1939905216 has 84 divisors (see below), whose sum is σ = 5627519352. Its totient is φ = 638828544.

The previous prime is 1939905179. The next prime is 1939905221. The reversal of 1939905216 is 6125099391.

It is a happy number.

1939905216 is a `hidden beast` number, since 1 + 9 + 39 + 90 + 521 + 6 = 666.

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 11 ways as a sum of consecutive naturals, for example, 27520 + ... + 68096.

It is an arithmetic number, because the mean of its divisors is an integer number (66994278).

Almost surely, 2^1939905216 is an apocalyptic number.

1939905216 is a gapful number since it is divisible by the number (16) 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 1939905216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2813759676).

1939905216 is an abundant number, since it is smaller than the sum of its proper divisors (3687614136).

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

1939905216 is a wasteful number, since it uses less digits than its factorization.

1939905216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40678 (or 40665 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 1939905216 is about 44044.3550980145. The cubic root of 1939905216 is about 1247.1733924631.

The spelling of 1939905216 in words is "one billion, nine hundred thirty-nine million, nine hundred five thousand, two hundred sixteen".