1405423438 has 16 divisors (see below), whose sum is σ = 2159791920. Its totient is φ = 685532736.

The previous prime is 1405423421. The next prime is 1405423447. The reversal of 1405423438 is 8343245041.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64168 + ... + 83236.

It is an arithmetic number, because the mean of its divisors is an integer number (134986995).

Almost surely, 2^1405423438 is an apocalyptic number.

1405423438 is a deficient number, since it is larger than the sum of its proper divisors (754368482).

1405423438 is a wasteful number, since it uses less digits than its factorization.

1405423438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19971.

The product of its (nonzero) digits is 46080, while the sum is 34.

The square root of 1405423438 is about 37488.9775534089. The cubic root of 1405423438 is about 1120.1316379076.

Adding to 1405423438 its reverse (8343245041), we get a palindrome (9748668479).

The spelling of 1405423438 in words is "one billion, four hundred five million, four hundred twenty-three thousand, four hundred thirty-eight".