1401320144 has 20 divisors (see below), whose sum is σ = 3102923424. Its totient is φ = 600565728.

The previous prime is 1401320143. The next prime is 1401320147. The reversal of 1401320144 is 4410231041.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401320143) 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, 6255782 + ... + 6256005.

Almost surely, 2^1401320144 is an apocalyptic number.

1401320144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1401320144 is an abundant number, since it is smaller than the sum of its proper divisors (1701603280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1401320144 is a wasteful number, since it uses less digits than its factorization.

1401320144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12511802 (or 12511796 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1401320144 is about 37434.2108772176. The cubic root of 1401320144 is about 1119.0404579244.

Adding to 1401320144 its reverse (4410231041), we get a palindrome (5811551185).

The spelling of 1401320144 in words is "one billion, four hundred one million, three hundred twenty thousand, one hundred forty-four".