1428840001 has 4 divisors (see below), whose sum is σ = 1429838532. Its totient is φ = 1427841472.

The previous prime is 1428839927. The next prime is 1428840011. The reversal of 1428840001 is 1000488241.

It is a Cunningham number, because it is equal to 37800²+1.

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 1185011776 + 243828225 = 34424^2 + 15615^2 .

It is a cyclic number.

It is not a de Polignac number, because 1428840001 - 2¹⁷ = 1428708929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1428840011) 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, 497116 + ... + 499981.

It is an arithmetic number, because the mean of its divisors is an integer number (357459633).

Almost surely, 2^1428840001 is an apocalyptic number.

It is an amenable number.

1428840001 is a deficient number, since it is larger than the sum of its proper divisors (998531).

1428840001 is an equidigital number, since it uses as much as digits as its factorization.

1428840001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998530.

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 1428840001 is about 37800.0000132275. Note that the first 4 decimals coincide. The cubic root of 1428840001 is about 1126.3184544844.

It can be divided in two parts, 14288 and 40001, that added together give a square (54289 = 233²).

The spelling of 1428840001 in words is "one billion, four hundred twenty-eight million, eight hundred forty thousand, one".