1357638 has 16 divisors (see below), whose sum is σ = 2727216. Its totient is φ = 450560.

The previous prime is 1357619. The next prime is 1357651. The reversal of 1357638 is 8367531.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1357599 and 1357608.

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, 1798 + ... + 2438.

It is an arithmetic number, because the mean of its divisors is an integer number (170451).

2^1357638 is an apocalyptic number.

1357638 is an abundant number, since it is smaller than the sum of its proper divisors (1369578).

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

1357638 is a wasteful number, since it uses less digits than its factorization.

1357638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999.

The product of its digits is 15120, while the sum is 33.

The square root of 1357638 is about 1165.1772397365. The cubic root of 1357638 is about 110.7289874139.

The spelling of 1357638 in words is "one million, three hundred fifty-seven thousand, six hundred thirty-eight".