1401408140 has 24 divisors (see below), whose sum is σ = 3210499152. Its totient is φ = 509602880.

The previous prime is 1401408131. The next prime is 1401408143. The reversal of 1401408140 is 418041041.

It is not an unprimeable number, because it can be changed into a prime (1401408143) 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, 3184799 + ... + 3185238.

It is an arithmetic number, because the mean of its divisors is an integer number (133770798).

Almost surely, 2^1401408140 is an apocalyptic number.

1401408140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1401408140 is an abundant number, since it is smaller than the sum of its proper divisors (1809091012).

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

1401408140 is a wasteful number, since it uses less digits than its factorization.

1401408140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6370057 (or 6370055 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 1401408140 is about 37435.3862007593. The cubic root of 1401408140 is about 1119.0638808430.

Adding to 1401408140 its reverse (418041041), we get a palindrome (1819449181).

The spelling of 1401408140 in words is "one billion, four hundred one million, four hundred eight thousand, one hundred forty".