1438546636 has 12 divisors (see below), whose sum is σ = 2542382640. Its totient is φ = 712151600.

The previous prime is 1438546631. The next prime is 1438546667. The reversal of 1438546636 is 6366458341.

It is not an unprimeable number, because it can be changed into a prime (1438546631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1779976 + ... + 1780783.

It is an arithmetic number, because the mean of its divisors is an integer number (211865220).

Almost surely, 2^1438546636 is an apocalyptic number.

It is an amenable number.

1438546636 is a deficient number, since it is larger than the sum of its proper divisors (1103836004).

1438546636 is a wasteful number, since it uses less digits than its factorization.

1438546636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3560864 (or 3560862 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 46.

The square root of 1438546636 is about 37928.1773355905. The cubic root of 1438546636 is about 1128.8631990279.

The spelling of 1438546636 in words is "one billion, four hundred thirty-eight million, five hundred forty-six thousand, six hundred thirty-six".