1373664 has 48 divisors (see below), whose sum is σ = 3704400. Its totient is φ = 445440.

The previous prime is 1373639. The next prime is 1373677. The reversal of 1373664 is 4663731.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3762 + ... + 4110.

It is an arithmetic number, because the mean of its divisors is an integer number (77175).

2^1373664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1373664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1852200).

1373664 is an abundant number, since it is smaller than the sum of its proper divisors (2330736).

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

1373664 is a wasteful number, since it uses less digits than its factorization.

1373664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403 (or 395 counting only the distinct ones).

The product of its digits is 9072, while the sum is 30.

The square root of 1373664 is about 1172.0341291959. The cubic root of 1373664 is about 111.1629778589.

The spelling of 1373664 in words is "one million, three hundred seventy-three thousand, six hundred sixty-four".