1720003398 has 16 divisors (see below), whose sum is σ = 3558628080. Its totient is φ = 553564256.

The previous prime is 1720003393. The next prime is 1720003429. The reversal of 1720003398 is 8933000271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720003393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4942365 + ... + 4942712.

It is an arithmetic number, because the mean of its divisors is an integer number (222414255).

Almost surely, 2^1720003398 is an apocalyptic number.

1720003398 is an abundant number, since it is smaller than the sum of its proper divisors (1838624682).

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

1720003398 is a wasteful number, since it uses less digits than its factorization.

1720003398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9885111.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 1720003398 is about 41472.9236731630. The cubic root of 1720003398 is about 1198.1460719897.

The spelling of 1720003398 in words is "one billion, seven hundred twenty million, three thousand, three hundred ninety-eight".