1729406 has 16 divisors (see below), whose sum is σ = 3026400. Its totient is φ = 740880.

The previous prime is 1729391. The next prime is 1729433. The reversal of 1729406 is 6049271.

It is a super-2 number, since 2×1729406² = 5981690225672, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 575 + ... + 1946.

It is an arithmetic number, because the mean of its divisors is an integer number (189150).

2^1729406 is an apocalyptic number.

1729406 is a deficient number, since it is larger than the sum of its proper divisors (1296994).

1729406 is an equidigital number, since it uses as much as digits as its factorization.

1729406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2544 (or 2530 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 1729406 is about 1315.0688194920. The cubic root of 1729406 is about 120.0325374731.

The spelling of 1729406 in words is "one million, seven hundred twenty-nine thousand, four hundred six".