1428839743 has 4 divisors (see below), whose sum is σ = 1429949520. Its totient is φ = 1427729968.

The previous prime is 1428839717. The next prime is 1428839747. The reversal of 1428839743 is 3479388241.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1428839743 is a prime.

It is a super-2 number, since 2×1428839743² = 4083166022352612098, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428839747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 552955 + ... + 555532.

It is an arithmetic number, because the mean of its divisors is an integer number (357487380).

Almost surely, 2^1428839743 is an apocalyptic number.

1428839743 is a deficient number, since it is larger than the sum of its proper divisors (1109777).

1428839743 is a wasteful number, since it uses less digits than its factorization.

1428839743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109776.

The product of its digits is 1161216, while the sum is 49.

The square root of 1428839743 is about 37799.9966005289. The cubic root of 1428839743 is about 1126.3183866928.

The spelling of 1428839743 in words is "one billion, four hundred twenty-eight million, eight hundred thirty-nine thousand, seven hundred forty-three".