1385880 has 32 divisors (see below), whose sum is σ = 4158000. Its totient is φ = 369536.

The previous prime is 1385873. The next prime is 1385887. The reversal of 1385880 is 885831.

It is an interprime number because it is at equal distance from previous prime (1385873) and next prime (1385887).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385887) 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, 5655 + ... + 5894.

2^1385880 is an apocalyptic number.

1385880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1385880 is an abundant number, since it is smaller than the sum of its proper divisors (2772120).

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

1385880 is a wasteful number, since it uses less digits than its factorization.

1385880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11563 (or 11559 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 1385880 is about 1177.2340463986. The cubic root of 1385880 is about 111.4915301200.

It can be divided in two parts, 1 and 385880, that added together give a triangular number (385881 = T₈₇₈).

The spelling of 1385880 in words is "one million, three hundred eighty-five thousand, eight hundred eighty".