1919434040 has 32 divisors (see below), whose sum is σ = 4340666880. Its totient is φ = 763873152.

The previous prime is 1919434021. The next prime is 1919434057. The reversal of 1919434040 is 404349191.

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, 113912 + ... + 129671.

It is an arithmetic number, because the mean of its divisors is an integer number (135645840).

Almost surely, 2^1919434040 is an apocalyptic number.

1919434040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1919434040 is an abundant number, since it is smaller than the sum of its proper divisors (2421232840).

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

1919434040 is a wasteful number, since it uses less digits than its factorization.

1919434040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243791 (or 243787 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 1919434040 is about 43811.3460190394. The cubic root of 1919434040 is about 1242.7708675115.

The spelling of 1919434040 in words is "one billion, nine hundred nineteen million, four hundred thirty-four thousand, forty".