1385920 has 56 divisors (see below), whose sum is σ = 3401568. Its totient is φ = 537600.

The previous prime is 1385899. The next prime is 1385921. The reversal of 1385920 is 295831.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385921) 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, 19485 + ... + 19555.

2^1385920 is an apocalyptic number.

1385920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1385920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1700784).

1385920 is an abundant number, since it is smaller than the sum of its proper divisors (2015648).

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

1385920 is an equidigital number, since it uses as much as digits as its factorization.

1385920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1385920 is about 1177.2510352512. The cubic root of 1385920 is about 111.4926027522.

The spelling of 1385920 in words is "one million, three hundred eighty-five thousand, nine hundred twenty".