1401444340 has 24 divisors (see below), whose sum is σ = 2943736992. Its totient is φ = 560443680.

The previous prime is 1401444281. The next prime is 1401444413. The reversal of 1401444340 is 434441041.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155847 + ... + 164593.

It is an arithmetic number, because the mean of its divisors is an integer number (122655708).

Almost surely, 2^1401444340 is an apocalyptic number.

1401444340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1401444340 is an abundant number, since it is smaller than the sum of its proper divisors (1542292652).

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

1401444340 is a wasteful number, since it uses less digits than its factorization.

1401444340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16767 (or 16765 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 1401444340 is about 37435.8696973905. The cubic root of 1401444340 is about 1119.0735163333.

Adding to 1401444340 its reverse (434441041), we get a palindrome (1835885381).

The spelling of 1401444340 in words is "one billion, four hundred one million, four hundred forty-four thousand, three hundred forty".