1438380 has 72 divisors (see below), whose sum is σ = 4468464. Its totient is φ = 374400.

The previous prime is 1438379. The next prime is 1438399. The reversal of 1438380 is 838341.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10915 + ... + 11045.

It is an arithmetic number, because the mean of its divisors is an integer number (62062).

2^1438380 is an apocalyptic number.

1438380 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 1438380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2234232).

1438380 is an abundant number, since it is smaller than the sum of its proper divisors (3030084).

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

1438380 is a wasteful number, since it uses less digits than its factorization.

1438380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1438380 is about 1199.3248100494. The cubic root of 1438380 is about 112.8819609545.

The spelling of 1438380 in words is "one million, four hundred thirty-eight thousand, three hundred eighty".