1438381475 has 96 divisors (see below), whose sum is σ = 2094615936. Its totient is φ = 973209600.

The previous prime is 1438381447. The next prime is 1438381481. The reversal of 1438381475 is 5741838341.

It is a Cunningham number, because it is equal to 37926²-1.

It is not a de Polignac number, because 1438381475 - 2¹² = 1438377379 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 14828627 + ... + 14828723.

It is an arithmetic number, because the mean of its divisors is an integer number (21818916).

Almost surely, 2^1438381475 is an apocalyptic number.

1438381475 is a deficient number, since it is larger than the sum of its proper divisors (656234461).

1438381475 is a wasteful number, since it uses less digits than its factorization.

1438381475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 220 counting only the distinct ones).

The product of its digits is 322560, while the sum is 44.

The square root of 1438381475 is about 37925.9999868164. Note that the first 4 decimals coincide. The cubic root of 1438381475 is about 1128.8199953978.

The spelling of 1438381475 in words is "one billion, four hundred thirty-eight million, three hundred eighty-one thousand, four hundred seventy-five".