1428764401 has 3 divisors (see below), whose sum is σ = 1428802201. Its totient is φ = 1428726602.

The previous prime is 1428764377. The next prime is 1428764419. The reversal of 1428764401 is 1044678241.

It is a happy number.

The square root of 1428764401 is 37799.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1044678241 = 421 ⋅2481421.

It is not a de Polignac number, because 1428764401 - 2⁷ = 1428764273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1428764101) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 18900 + ... + 56698.

Almost surely, 2^1428764401 is an apocalyptic number.

1428764401 is the 37799-th square number.

1428764401 is the 18900-th centered octagonal number.

It is an amenable number.

1428764401 is a deficient number, since it is larger than the sum of its proper divisors (37800).

1428764401 is an frugal number, since it uses more digits than its factorization.

1428764401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75598 (or 37799 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The cubic root of 1428764401 is about 1126.2985896111.

The spelling of 1428764401 in words is "one billion, four hundred twenty-eight million, seven hundred sixty-four thousand, four hundred one".