1623478438 has 4 divisors (see below), whose sum is σ = 2435217660. Its totient is φ = 811739218.

The previous prime is 1623478433. The next prime is 1623478469. The reversal of 1623478438 is 8348743261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8348743261 = 12007 ⋅695323.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1623478433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405869608 + ... + 405869611.

It is an arithmetic number, because the mean of its divisors is an integer number (608804415).

Almost surely, 2^1623478438 is an apocalyptic number.

1623478438 is a deficient number, since it is larger than the sum of its proper divisors (811739222).

1623478438 is an equidigital number, since it uses as much as digits as its factorization.

1623478438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811739221.

The product of its digits is 774144, while the sum is 46.

The square root of 1623478438 is about 40292.4116677074. The cubic root of 1623478438 is about 1175.3002855274.

The spelling of 1623478438 in words is "one billion, six hundred twenty-three million, four hundred seventy-eight thousand, four hundred thirty-eight".