1720890268 has 24 divisors (see below), whose sum is σ = 3307893120. Its totient is φ = 779716080.

The previous prime is 1720890191. The next prime is 1720890271. The reversal of 1720890268 is 8620980271.

It is a super-2 number, since 2×1720890268² = 5922926628994223648, which contains 22 as substring.

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, 490498 + ... + 493993.

It is an arithmetic number, because the mean of its divisors is an integer number (137828880).

Almost surely, 2^1720890268 is an apocalyptic number.

It is an amenable number.

1720890268 is a deficient number, since it is larger than the sum of its proper divisors (1587002852).

1720890268 is a wasteful number, since it uses less digits than its factorization.

1720890268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984537 (or 984535 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 1720890268 is about 41483.6144519737. The cubic root of 1720890268 is about 1198.3519663942.

The spelling of 1720890268 in words is "one billion, seven hundred twenty million, eight hundred ninety thousand, two hundred sixty-eight".