1919133240 has 64 divisors (see below), whose sum is σ = 5808391200. Its totient is φ = 507236352.

The previous prime is 1919133191. The next prime is 1919133241. The reversal of 1919133240 is 423319191.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1919133241) 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, 57205 + ... + 84324.

Almost surely, 2^1919133240 is an apocalyptic number.

1919133240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1919133240 is an abundant number, since it is smaller than the sum of its proper divisors (3889257960).

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

1919133240 is a wasteful number, since it uses less digits than its factorization.

1919133240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141656 (or 141652 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 1919133240 is about 43807.9129838435. The cubic root of 1919133240 is about 1242.7059447272.

The spelling of 1919133240 in words is "one billion, nine hundred nineteen million, one hundred thirty-three thousand, two hundred forty".