738842638 has 4 divisors (see below), whose sum is σ = 1108263960. Its totient is φ = 369421318.

The previous prime is 738842633. The next prime is 738842647. The reversal of 738842638 is 836248837.

738842638 is nontrivially palindromic in base 4.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 836248837 = 701 ⋅1192937.

It is a junction number, because it is equal to n+sod(n) for n = 738842591 and 738842600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (738842633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 184710658 + ... + 184710661.

It is an arithmetic number, because the mean of its divisors is an integer number (277065990).

Almost surely, 2^738842638 is an apocalyptic number.

738842638 is a deficient number, since it is larger than the sum of its proper divisors (369421322).

738842638 is a wasteful number, since it uses less digits than its factorization.

738842638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369421321.

The product of its digits is 1548288, while the sum is 49.

The square root of 738842638 is about 27181.6599566693. The cubic root of 738842638 is about 904.0323746139.

The spelling of 738842638 in words is "seven hundred thirty-eight million, eight hundred forty-two thousand, six hundred thirty-eight".