1428722401 has 8 divisors (see below), whose sum is σ = 1435150080. Its totient is φ = 1422310032.

The previous prime is 1428722377. The next prime is 1428722411. The reversal of 1428722401 is 1042278241.

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 1428722401 - 2⁵ = 1428722369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1428722411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208831 + ... + 215563.

It is an arithmetic number, because the mean of its divisors is an integer number (179393760).

Almost surely, 2^1428722401 is an apocalyptic number.

It is an amenable number.

1428722401 is a deficient number, since it is larger than the sum of its proper divisors (6427679).

1428722401 is an equidigital number, since it uses as much as digits as its factorization.

1428722401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7655.

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 1428722401 is about 37798.4444256639. Note that the first 4 decimals coincide. The cubic root of 1428722401 is about 1126.2875532675.

The spelling of 1428722401 in words is "one billion, four hundred twenty-eight million, seven hundred twenty-two thousand, four hundred one".