1438407 has 12 divisors (see below), whose sum is σ = 2091544. Its totient is φ = 952560.

The previous prime is 1438399. The next prime is 1438417. The reversal of 1438407 is 7048341.

It is not a de Polignac number, because 1438407 - 2³ = 1438399 is a prime.

It is a Duffinian number.

1438407 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1188 + ... + 2070.

2^1438407 is an apocalyptic number.

1438407 is a deficient number, since it is larger than the sum of its proper divisors (653137).

1438407 is a wasteful number, since it uses less digits than its factorization.

1438407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070 (or 1067 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 1438407 is about 1199.3360663300. The cubic root of 1438407 is about 112.8826672569.

The spelling of 1438407 in words is "one million, four hundred thirty-eight thousand, four hundred seven".