1919035144 has 64 divisors (see below), whose sum is σ = 3947408640. Its totient is φ = 869272320.

The previous prime is 1919035117. The next prime is 1919035147. The reversal of 1919035144 is 4415309191.

It is not an unprimeable number, because it can be changed into a prime (1919035147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2163069 + ... + 2163955.

It is an arithmetic number, because the mean of its divisors is an integer number (61678260).

Almost surely, 2^1919035144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1919035144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1973704320).

1919035144 is an abundant number, since it is smaller than the sum of its proper divisors (2028373496).

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

1919035144 is a wasteful number, since it uses less digits than its factorization.

1919035144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270 (or 1266 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 1919035144 is about 43806.7933544559. The cubic root of 1919035144 is about 1242.6847708353.

The spelling of 1919035144 in words is "one billion, nine hundred nineteen million, thirty-five thousand, one hundred forty-four".