1544140040 has 16 divisors (see below), whose sum is σ = 3474315180. Its totient is φ = 617656000.

The previous prime is 1544140027. The next prime is 1544140049. The reversal of 1544140040 is 400414451.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1285509316 + 258630724 = 35854^2 + 16082^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1544139988 and 1544140015.

It is not an unprimeable number, because it can be changed into a prime (1544140049) 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, 19301711 + ... + 19301790.

Almost surely, 2^1544140040 is an apocalyptic number.

1544140040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1544140040 is an abundant number, since it is smaller than the sum of its proper divisors (1930175140).

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

1544140040 is a wasteful number, since it uses less digits than its factorization.

1544140040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38603512 (or 38603508 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 1544140040 is about 39295.5473304546. The cubic root of 1544140040 is about 1155.8342554403.

Adding to 1544140040 its reverse (400414451), we get a palindrome (1944554491).

The spelling of 1544140040 in words is "one billion, five hundred forty-four million, one hundred forty thousand, forty".