1999517430 has 32 divisors (see below), whose sum is σ = 4805568000. Its totient is φ = 532457312.

The previous prime is 1999517419. The next prime is 1999517437. The reversal of 1999517430 is 347159991.

It is a self number, because there is not a number n which added to its sum of digits gives 1999517430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999517437) 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, 24780 + ... + 67919.

It is an arithmetic number, because the mean of its divisors is an integer number (150174000).

Almost surely, 2^1999517430 is an apocalyptic number.

1999517430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1999517430 is an abundant number, since it is smaller than the sum of its proper divisors (2806050570).

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

1999517430 is a wasteful number, since it uses less digits than its factorization.

1999517430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93428.

The product of its (nonzero) digits is 306180, while the sum is 48.

The square root of 1999517430 is about 44715.9639278860. The cubic root of 1999517430 is about 1259.8197083935.

The spelling of 1999517430 in words is "one billion, nine hundred ninety-nine million, five hundred seventeen thousand, four hundred thirty".