1540636 has 6 divisors (see below), whose sum is σ = 2696120. Its totient is φ = 770316.

The previous prime is 1540631. The next prime is 1540639. The reversal of 1540636 is 6360451.

It is a self number, because there is not a number n which added to its sum of digits gives 1540636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192576 + ... + 192583.

2^1540636 is an apocalyptic number.

It is an amenable number.

1540636 is a deficient number, since it is larger than the sum of its proper divisors (1155484).

1540636 is a wasteful number, since it uses less digits than its factorization.

1540636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385163 (or 385161 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 1540636 is about 1241.2235898500. The cubic root of 1540636 is about 115.4959300928.

The spelling of 1540636 in words is "one million, five hundred forty thousand, six hundred thirty-six".