1380000 has 120 divisors (see below), whose sum is σ = 4723488. Its totient is φ = 352000.

The previous prime is 1379993. The next prime is 1380007. The reversal of 1380000 is 831.

It is an interprime number because it is at equal distance from previous prime (1379993) and next prime (1380007).

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380007) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 59989 + ... + 60011.

2^1380000 is an apocalyptic number.

1380000 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 1380000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2361744).

1380000 is an abundant number, since it is smaller than the sum of its proper divisors (3343488).

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

1380000 is an equidigital number, since it uses as much as digits as its factorization.

1380000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56 (or 33 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1380000 is about 1174.7340124471. The cubic root of 1380000 is about 111.3336281521. Note that the first 3 decimals are identical.

Adding to 1380000 its reverse (831), we get a palindrome (1380831).

The spelling of 1380000 in words is "one million, three hundred eighty thousand".