1720979056 has 20 divisors (see below), whose sum is σ = 3336889104. Its totient is φ = 859846400.

The previous prime is 1720979041. The next prime is 1720979069. The reversal of 1720979056 is 6509790271.

It is a happy number.

It is a super-2 number, since 2×1720979056² = 5923537822381302272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1720978997 and 1720979015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17740 + ... + 61291.

Almost surely, 2^1720979056 is an apocalyptic number.

1720979056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1720979056 is a deficient number, since it is larger than the sum of its proper divisors (1615910048).

1720979056 is a wasteful number, since it uses less digits than its factorization.

1720979056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80400 (or 80394 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 46.

The square root of 1720979056 is about 41484.6845956432. The cubic root of 1720979056 is about 1198.3725753868.

The spelling of 1720979056 in words is "one billion, seven hundred twenty million, nine hundred seventy-nine thousand, fifty-six".