1478171938 has 4 divisors (see below), whose sum is σ = 2217257910. Its totient is φ = 739085968.

The previous prime is 1478171917. The next prime is 1478171957. The reversal of 1478171938 is 8391718741.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8391718741 = 7 ⋅1198816963.

It can be written as a sum of positive squares in only one way, i.e., 1421516209 + 56655729 = 37703^2 + 7527^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1478171891 and 1478171900.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 369542983 + ... + 369542986.

Almost surely, 2^1478171938 is an apocalyptic number.

1478171938 is a deficient number, since it is larger than the sum of its proper divisors (739085972).

1478171938 is an equidigital number, since it uses as much as digits as its factorization.

1478171938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739085971.

The product of its digits is 338688, while the sum is 49.

The square root of 1478171938 is about 38447.0016776341. The cubic root of 1478171938 is about 1139.1344455827.

The spelling of 1478171938 in words is "one billion, four hundred seventy-eight million, one hundred seventy-one thousand, nine hundred thirty-eight".