1919908692 has 72 divisors (see below), whose sum is σ = 5406677640. Its totient is φ = 570366720.

The previous prime is 1919908649. The next prime is 1919908717. The reversal of 1919908692 is 2968099191.

It can be written as a sum of positive squares in 4 ways, for example, as 29746116 + 1890162576 = 5454^2 + 43476^2 .

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 23 ways as a sum of consecutive naturals, for example, 57159 + ... + 84302.

It is an arithmetic number, because the mean of its divisors is an integer number (75092745).

Almost surely, 2^1919908692 is an apocalyptic number.

1919908692 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1919908692 is an abundant number, since it is smaller than the sum of its proper divisors (3486768948).

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

1919908692 is a wasteful number, since it uses less digits than its factorization.

1919908692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141513 (or 141508 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 54.

The square root of 1919908692 is about 43816.7626827907. The cubic root of 1919908692 is about 1242.8732996258.

The spelling of 1919908692 in words is "one billion, nine hundred nineteen million, nine hundred eight thousand, six hundred ninety-two".