1400444401 has 4 divisors (see below), whose sum is σ = 1461333312. Its totient is φ = 1339555492.

The previous prime is 1400444393. The next prime is 1400444431. The reversal of 1400444401 is 1044440041.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1044440041 = 4931 ⋅211811.

It is a cyclic number.

It is not a de Polignac number, because 1400444401 - 2³ = 1400444393 is a prime.

It is a super-2 number, since 2×1400444401² = 3922489040584497602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1400444431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30444421 + ... + 30444466.

It is an arithmetic number, because the mean of its divisors is an integer number (365333328).

Almost surely, 2^1400444401 is an apocalyptic number.

It is an amenable number.

1400444401 is a deficient number, since it is larger than the sum of its proper divisors (60888911).

1400444401 is an equidigital number, since it uses as much as digits as its factorization.

1400444401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60888910.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 1400444401 is about 37422.5119547045. The cubic root of 1400444401 is about 1118.8072977697.

Adding to 1400444401 its reverse (1044440041), we get a palindrome (2444884442).

The spelling of 1400444401 in words is "one billion, four hundred million, four hundred forty-four thousand, four hundred one".