1438623 has 24 divisors (see below), whose sum is σ = 2246400. Its totient is φ = 884304.

The previous prime is 1438609. The next prime is 1438643. The reversal of 1438623 is 3268341.

It is a happy number.

1438623 is a `hidden beast` number, since 1 + 4 + 38 + 623 = 666.

It is not a de Polignac number, because 1438623 - 2¹⁶ = 1373087 is a prime.

It is a super-2 number, since 2×1438623² = 4139272272258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7948 + ... + 8126.

It is an arithmetic number, because the mean of its divisors is an integer number (93600).

2^1438623 is an apocalyptic number.

1438623 is a deficient number, since it is larger than the sum of its proper divisors (807777).

1438623 is a wasteful number, since it uses less digits than its factorization.

1438623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 248 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 1438623 is about 1199.4261127723. The cubic root of 1438623 is about 112.8883173582. Note that the first 3 decimals are identical.

The spelling of 1438623 in words is "one million, four hundred thirty-eight thousand, six hundred twenty-three".