1438020 has 48 divisors (see below), whose sum is σ = 4475520. Its totient is φ = 383328.

The previous prime is 1438009. The next prime is 1438033. The reversal of 1438020 is 208341.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1437984 and 1438002.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 792 + ... + 1871.

It is an arithmetic number, because the mean of its divisors is an integer number (93240).

2^1438020 is an apocalyptic number.

1438020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1438020 is an abundant number, since it is smaller than the sum of its proper divisors (3037500).

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

1438020 is a wasteful number, since it uses less digits than its factorization.

1438020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2681 (or 2673 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1438020 is about 1199.1747162111. The cubic root of 1438020 is about 112.8725427440.

It can be divided in two parts, 14380 and 20, that added together give a square (14400 = 120²).

The spelling of 1438020 in words is "one million, four hundred thirty-eight thousand, twenty".