1373275638 has 48 divisors (see below), whose sum is σ = 3427307520. Its totient is φ = 389270448.

The previous prime is 1373275637. The next prime is 1373275643. The reversal of 1373275638 is 8365723731.

1373275638 is a `hidden beast` number, since 1 + 3 + 7 + 3 + 2 + 7 + 5 + 638 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1373275593 and 1373275602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1373275637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26908 + ... + 58911.

It is an arithmetic number, because the mean of its divisors is an integer number (71402240).

Almost surely, 2^1373275638 is an apocalyptic number.

1373275638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1373275638 is an abundant number, since it is smaller than the sum of its proper divisors (2054031882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1373275638 is a wasteful number, since it uses less digits than its factorization.

1373275638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85961 (or 85958 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The square root of 1373275638 is about 37057.7338486854. The cubic root of 1373275638 is about 1111.5250088014.

The spelling of 1373275638 in words is "one billion, three hundred seventy-three million, two hundred seventy-five thousand, six hundred thirty-eight".