1238644 has 12 divisors (see below), whose sum is σ = 2364768. Its totient is φ = 563000.

The previous prime is 1238621. The next prime is 1238647. The reversal of 1238644 is 4468321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14032 + ... + 14119.

It is an arithmetic number, because the mean of its divisors is an integer number (197064).

2^1238644 is an apocalyptic number.

It is an amenable number.

1238644 is a deficient number, since it is larger than the sum of its proper divisors (1126124).

1238644 is a wasteful number, since it uses less digits than its factorization.

1238644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28166 (or 28164 counting only the distinct ones).

The product of its digits is 4608, while the sum is 28.

The square root of 1238644 is about 1112.9438440461. The cubic root of 1238644 is about 107.3945314962.

The spelling of 1238644 in words is "one million, two hundred thirty-eight thousand, six hundred forty-four".