1540044 has 36 divisors (see below), whose sum is σ = 4247880. Its totient is φ = 466560.

The previous prime is 1540039. The next prime is 1540073. The reversal of 1540044 is 4400451.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1539999 and 1540026.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1549 + ... + 2340.

2^1540044 is an apocalyptic number.

It is an amenable number.

1540044 is an abundant number, since it is smaller than the sum of its proper divisors (2707836).

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

1540044 is a wasteful number, since it uses less digits than its factorization.

1540044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3910 (or 3905 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 1540044 is about 1240.9850925777. The cubic root of 1540044 is about 115.4811348285.

1540044 divided by its sum of digits (18) gives a palindrome (85558).

Adding to 1540044 its reverse (4400451), we get a palindrome (5940495).

It can be divided in two parts, 1 and 540044, that added together give a palindrome (540045).

The spelling of 1540044 in words is "one million, five hundred forty thousand, forty-four".