1385740 has 24 divisors (see below), whose sum is σ = 2933280. Its totient is φ = 549888.

The previous prime is 1385693. The next prime is 1385743. The reversal of 1385740 is 475831.

It is a junction number, because it is equal to n+sod(n) for n = 1385699 and 1385708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385743) 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, 3681 + ... + 4039.

It is an arithmetic number, because the mean of its divisors is an integer number (122220).

2^1385740 is an apocalyptic number.

1385740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1385740 is an abundant number, since it is smaller than the sum of its proper divisors (1547540).

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

1385740 is a wasteful number, since it uses less digits than its factorization.

1385740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561 (or 559 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 1385740 is about 1177.1745834837. The cubic root of 1385740 is about 111.4877757450.

Subtracting from 1385740 its reverse (475831), we obtain a palindrome (909909).

The spelling of 1385740 in words is "one million, three hundred eighty-five thousand, seven hundred forty".