1379638 has 16 divisors (see below), whose sum is σ = 2278080. Its totient is φ = 622656.

The previous prime is 1379633. The next prime is 1379639. The reversal of 1379638 is 8369731.

It is a super-2 number, since 2×1379638² = 3806802022088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1379597 and 1379606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1379633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 658 + ... + 1786.

It is an arithmetic number, because the mean of its divisors is an integer number (142380).

2^1379638 is an apocalyptic number.

1379638 is a deficient number, since it is larger than the sum of its proper divisors (898442).

1379638 is a wasteful number, since it uses less digits than its factorization.

1379638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191.

The product of its digits is 27216, while the sum is 37.

The square root of 1379638 is about 1174.5799249093. The cubic root of 1379638 is about 111.3238923313.

The spelling of 1379638 in words is "one million, three hundred seventy-nine thousand, six hundred thirty-eight".