1428988133 has 4 divisors (see below), whose sum is σ = 1433496300. Its totient is φ = 1424479968.

The previous prime is 1428988123. The next prime is 1428988151. The reversal of 1428988133 is 3318898241.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 194379364 + 1234608769 = 13942^2 + 35137^2 .

It is a cyclic number.

It is not a de Polignac number, because 1428988133 - 2¹⁴ = 1428971749 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 (1428988123) 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, 2253608 + ... + 2254241.

It is an arithmetic number, because the mean of its divisors is an integer number (358374075).

Almost surely, 2^1428988133 is an apocalyptic number.

It is an amenable number.

1428988133 is a deficient number, since it is larger than the sum of its proper divisors (4508167).

1428988133 is an equidigital number, since it uses as much as digits as its factorization.

1428988133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4508166.

The product of its digits is 331776, while the sum is 47.

The square root of 1428988133 is about 37801.9593804342. The cubic root of 1428988133 is about 1126.3573760431.

The spelling of 1428988133 in words is "one billion, four hundred twenty-eight million, nine hundred eighty-eight thousand, one hundred thirty-three".