1400444021 has 8 divisors (see below), whose sum is σ = 1405584000. Its totient is φ = 1395313920.

The previous prime is 1400444009. The next prime is 1400444029. The reversal of 1400444021 is 1204440041.

It is a happy number.

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 1400444021 - 2¹⁰ = 1400442997 is a prime.

It is a super-2 number, since 2×1400444021² = 3922486911909296882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1400443984 and 1400444002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400444029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383876 + ... + 387506.

It is an arithmetic number, because the mean of its divisors is an integer number (175698000).

Almost surely, 2^1400444021 is an apocalyptic number.

It is an amenable number.

1400444021 is a deficient number, since it is larger than the sum of its proper divisors (5139979).

1400444021 is an equidigital number, since it uses as much as digits as its factorization.

1400444021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4939.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1400444021 is about 37422.5068775463. The cubic root of 1400444021 is about 1118.8071965764.

Adding to 1400444021 its reverse (1204440041), we get a palindrome (2604884062).

The spelling of 1400444021 in words is "one billion, four hundred million, four hundred forty-four thousand, twenty-one".