1401330400 has 144 divisors (see below), whose sum is σ = 3649828896. Its totient is φ = 523550720.

The previous prime is 1401330377. The next prime is 1401330401. The reversal of 1401330400 is 40331041.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401330401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2270892 + ... + 2271508.

It is an arithmetic number, because the mean of its divisors is an integer number (25346034).

Almost surely, 2^1401330400 is an apocalyptic number.

1401330400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1401330400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1824914448).

1401330400 is an abundant number, since it is smaller than the sum of its proper divisors (2248498496).

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

1401330400 is a wasteful number, since it uses less digits than its factorization.

1401330400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821 (or 808 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1401330400 is about 37434.3478639604. The cubic root of 1401330400 is about 1119.0431879336.

Adding to 1401330400 its reverse (40331041), we get a palindrome (1441661441).

The spelling of 1401330400 in words is "one billion, four hundred one million, three hundred thirty thousand, four hundred".