1729490 has 32 divisors (see below), whose sum is σ = 3677184. Its totient is φ = 573120.

The previous prime is 1729487. The next prime is 1729493. The reversal of 1729490 is 949271.

It is an interprime number because it is at equal distance from previous prime (1729487) and next prime (1729493).

It is a super-2 number, since 2×1729490² = 5982271320200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1729493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1772 + ... + 2568.

It is an arithmetic number, because the mean of its divisors is an integer number (114912).

2^1729490 is an apocalyptic number.

1729490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1729490 is an abundant number, since it is smaller than the sum of its proper divisors (1947694).

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

1729490 is a wasteful number, since it uses less digits than its factorization.

1729490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 1729490 is about 1315.1007565962. The cubic root of 1729490 is about 120.0344808321.

The spelling of 1729490 in words is "one million, seven hundred twenty-nine thousand, four hundred ninety".