1401728743 has 8 divisors (see below), whose sum is σ = 1477300400. Its totient is φ = 1326336768.

The previous prime is 1401728707. The next prime is 1401728747. The reversal of 1401728743 is 3478271041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1401728743 - 2⁹ = 1401728231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401728747) 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, 28746 + ... + 60247.

It is an arithmetic number, because the mean of its divisors is an integer number (184662550).

Almost surely, 2^1401728743 is an apocalyptic number.

1401728743 is a deficient number, since it is larger than the sum of its proper divisors (75571657).

1401728743 is an equidigital number, since it uses as much as digits as its factorization.

1401728743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89841.

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 1401728743 is about 37439.6680407292. The cubic root of 1401728743 is about 1119.1492111788.

Adding to 1401728743 its reverse (3478271041), we get a palindrome (4879999784).

The spelling of 1401728743 in words is "one billion, four hundred one million, seven hundred twenty-eight thousand, seven hundred forty-three".