1728161446 has 24 divisors (see below), whose sum is σ = 2947588560. Its totient is φ = 758437680.

The previous prime is 1728161441. The next prime is 1728161453. The reversal of 1728161446 is 6441618271.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a pancake number, because a pancake can be divided into 1728161446 parts by 58790 straight cuts.

It is a junction number, because it is equal to n+sod(n) for n = 1728161399 and 1728161408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1728161441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116106 + ... + 130141.

It is an arithmetic number, because the mean of its divisors is an integer number (122816190).

Almost surely, 2^1728161446 is an apocalyptic number.

1728161446 is a deficient number, since it is larger than the sum of its proper divisors (1219427114).

1728161446 is a wasteful number, since it uses less digits than its factorization.

1728161446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246300 (or 246289 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 1728161446 is about 41571.1612298718. The cubic root of 1728161446 is about 1200.0373705954.

It can be divided in two parts, 172 and 8161446, that added together give a palindrome (8161618).

The spelling of 1728161446 in words is "one billion, seven hundred twenty-eight million, one hundred sixty-one thousand, four hundred forty-six".