1728880957 has 2 divisors, whose sum is σ = 1728880958. Its totient is φ = 1728880956.

The previous prime is 1728880913. The next prime is 1728880963. The reversal of 1728880957 is 7590888271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1644626916 + 84254041 = 40554^2 + 9179^2 .

It is a cyclic number.

It is not a de Polignac number, because 1728880957 - 2²⁷ = 1594663229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1728880898 and 1728880907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1728880057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 864440478 + 864440479.

It is an arithmetic number, because the mean of its divisors is an integer number (864440479).

Almost surely, 2^1728880957 is an apocalyptic number.

It is an amenable number.

1728880957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1728880957 is an equidigital number, since it uses as much as digits as its factorization.

1728880957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2257920, while the sum is 55.

The square root of 1728880957 is about 41579.8142973246. The cubic root of 1728880957 is about 1200.2038905867.

The spelling of 1728880957 in words is "one billion, seven hundred twenty-eight million, eight hundred eighty thousand, nine hundred fifty-seven".