1428722158 has 4 divisors (see below), whose sum is σ = 2143083240. Its totient is φ = 714361078.

The previous prime is 1428722153. The next prime is 1428722213. The reversal of 1428722158 is 8512278241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8512278241 = 47 ⋅181112303.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1428722158.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428722153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 357180538 + ... + 357180541.

It is an arithmetic number, because the mean of its divisors is an integer number (535770810).

Almost surely, 2^1428722158 is an apocalyptic number.

1428722158 is a deficient number, since it is larger than the sum of its proper divisors (714361082).

1428722158 is an equidigital number, since it uses as much as digits as its factorization.

1428722158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714361081.

The product of its digits is 71680, while the sum is 40.

The square root of 1428722158 is about 37798.4412112457. The cubic root of 1428722158 is about 1126.2874894138.

The spelling of 1428722158 in words is "one billion, four hundred twenty-eight million, seven hundred twenty-two thousand, one hundred fifty-eight".