1400020311 has 4 divisors (see below), whose sum is σ = 1866693752. Its totient is φ = 933346872.

The previous prime is 1400020309. The next prime is 1400020313. The reversal of 1400020311 is 1130200041.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1400020309) and next prime (1400020313).

It is not a de Polignac number, because 1400020311 - 2¹ = 1400020309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400020313) 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, 233336716 + ... + 233336721.

It is an arithmetic number, because the mean of its divisors is an integer number (466673438).

Almost surely, 2^1400020311 is an apocalyptic number.

1400020311 is a deficient number, since it is larger than the sum of its proper divisors (466673441).

1400020311 is an equidigital number, since it uses as much as digits as its factorization.

1400020311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466673440.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1400020311 is about 37416.8452839092. The cubic root of 1400020311 is about 1118.6943519817.

Adding to 1400020311 its reverse (1130200041), we get a palindrome (2530220352).

The spelling of 1400020311 in words is "one billion, four hundred million, twenty thousand, three hundred eleven".