1379664 has 120 divisors (see below), whose sum is σ = 4603872. Its totient is φ = 380160.

The previous prime is 1379663. The next prime is 1379681. The reversal of 1379664 is 4669731.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1379663) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20559 + ... + 20625.

2^1379664 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 1379664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2301936).

1379664 is an abundant number, since it is smaller than the sum of its proper divisors (3224208).

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

1379664 is a wasteful number, since it uses less digits than its factorization.

1379664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105 (or 96 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 1379664 is about 1174.5909926438. The cubic root of 1379664 is about 111.3245916459.

It can be divided in two parts, 137 and 9664, that added together give a square (9801 = 99²).

The spelling of 1379664 in words is "one million, three hundred seventy-nine thousand, six hundred sixty-four".