1919157268 has 24 divisors (see below), whose sum is σ = 4064098752. Its totient is φ = 774113664.

The previous prime is 1919157259. The next prime is 1919157277. The reversal of 1919157268 is 8627519191.

It is an interprime number because it is at equal distance from previous prime (1919157259) and next prime (1919157277).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2015446 + ... + 2016397.

It is an arithmetic number, because the mean of its divisors is an integer number (169337448).

Almost surely, 2^1919157268 is an apocalyptic number.

It is an amenable number.

1919157268 is an abundant number, since it is smaller than the sum of its proper divisors (2144941484).

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

1919157268 is a wasteful number, since it uses less digits than its factorization.

1919157268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4031871 (or 4031869 counting only the distinct ones).

The product of its digits is 272160, while the sum is 49.

The square root of 1919157268 is about 43808.1872256773. The cubic root of 1919157268 is about 1242.7111310292.

The spelling of 1919157268 in words is "one billion, nine hundred nineteen million, one hundred fifty-seven thousand, two hundred sixty-eight".