1543400140 has 24 divisors (see below), whose sum is σ = 3241888272. Its totient is φ = 617217600.

The previous prime is 1543400107. The next prime is 1543400167. The reversal of 1543400140 is 410043451.

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, 143842 + ... + 154198.

It is an arithmetic number, because the mean of its divisors is an integer number (135078678).

Almost surely, 2^1543400140 is an apocalyptic number.

1543400140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1543400140 is an abundant number, since it is smaller than the sum of its proper divisors (1698488132).

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

1543400140 is a wasteful number, since it uses less digits than its factorization.

1543400140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17817 (or 17815 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1543400140 is about 39286.1316497311. The cubic root of 1543400140 is about 1155.6496136387.

Adding to 1543400140 its reverse (410043451), we get a palindrome (1953443591).

The spelling of 1543400140 in words is "one billion, five hundred forty-three million, four hundred thousand, one hundred forty".