1400440001 has 4 divisors (see below), whose sum is σ = 1401562500. Its totient is φ = 1399317504.

The previous prime is 1400439979. The next prime is 1400440003. The reversal of 1400440001 is 1000440041.

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 282206401 + 1118233600 = 16799^2 + 33440^2 .

It is a cyclic number.

It is not a de Polignac number, because 1400440001 - 2¹⁴ = 1400423617 is a prime.

It is a super-2 number, since 2×1400440001² = 3922464392801760002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1400440003) 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 3 ways as a sum of consecutive naturals, for example, 559376 + ... + 561873.

It is an arithmetic number, because the mean of its divisors is an integer number (350390625).

Almost surely, 2^1400440001 is an apocalyptic number.

It is an amenable number.

1400440001 is a deficient number, since it is larger than the sum of its proper divisors (1122499).

1400440001 is a wasteful number, since it uses less digits than its factorization.

1400440001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122498.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1400440001 is about 37422.4531665149. The cubic root of 1400440001 is about 1118.8061260566.

Adding to 1400440001 its reverse (1000440041), we get a palindrome (2400880042).

The spelling of 1400440001 in words is "one billion, four hundred million, four hundred forty thousand, one".