1438739623 has 8 divisors (see below), whose sum is σ = 1473178256. Its totient is φ = 1404345600.

The previous prime is 1438739593. The next prime is 1438739657. The reversal of 1438739623 is 3269378341.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1438739623 - 2⁵ = 1438739591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438739683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59383 + ... + 80023.

It is an arithmetic number, because the mean of its divisors is an integer number (184147282).

Almost surely, 2^1438739623 is an apocalyptic number.

1438739623 is a deficient number, since it is larger than the sum of its proper divisors (34438633).

1438739623 is a wasteful number, since it uses less digits than its factorization.

1438739623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22305.

The product of its digits is 653184, while the sum is 46.

The square root of 1438739623 is about 37930.7213614505. The cubic root of 1438739623 is about 1128.9136773314.

The spelling of 1438739623 in words is "one billion, four hundred thirty-eight million, seven hundred thirty-nine thousand, six hundred twenty-three".