1729228 has 24 divisors (see below), whose sum is σ = 3246320. Its totient is φ = 803520.

The previous prime is 1729207. The next prime is 1729229. The reversal of 1729228 is 8229271.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1729228.

It is not an unprimeable number, because it can be changed into a prime (1729229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4450 + ... + 4822.

2^1729228 is an apocalyptic number.

It is an amenable number.

1729228 is a deficient number, since it is larger than the sum of its proper divisors (1517092).

1729228 is a wasteful number, since it uses less digits than its factorization.

1729228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457 (or 455 counting only the distinct ones).

The product of its digits is 4032, while the sum is 31.

The square root of 1729228 is about 1315.0011406839. The cubic root of 1729228 is about 120.0284191950.

The spelling of 1729228 in words is "one million, seven hundred twenty-nine thousand, two hundred twenty-eight".