1375391448 has 32 divisors (see below), whose sum is σ = 3820532400. Its totient is φ = 458463744.

The previous prime is 1375391447. The next prime is 1375391449. The reversal of 1375391448 is 8441935731.

It is an interprime number because it is at equal distance from previous prime (1375391447) and next prime (1375391449).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375391441) 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, 3183561 + ... + 3183992.

Almost surely, 2^1375391448 is an apocalyptic number.

1375391448 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1375391448 is an abundant number, since it is smaller than the sum of its proper divisors (2445140952).

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

1375391448 is a wasteful number, since it uses less digits than its factorization.

1375391448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6367568 (or 6367558 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 1375391448 is about 37086.2703436191. The cubic root of 1375391448 is about 1112.0955592189.

The spelling of 1375391448 in words is "one billion, three hundred seventy-five million, three hundred ninety-one thousand, four hundred forty-eight".