1375745784 has 128 divisors (see below), whose sum is σ = 4051069440. Its totient is φ = 381169152.

The previous prime is 1375745731. The next prime is 1375745797. The reversal of 1375745784 is 4875475731.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1133562 + ... + 1134774.

It is an arithmetic number, because the mean of its divisors is an integer number (31648980).

Almost surely, 2^1375745784 is an apocalyptic number.

1375745784 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1375745784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2025534720).

1375745784 is an abundant number, since it is smaller than the sum of its proper divisors (2675323656).

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

1375745784 is a wasteful number, since it uses less digits than its factorization.

1375745784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1429 (or 1425 counting only the distinct ones).

The product of its digits is 3292800, while the sum is 51.

The square root of 1375745784 is about 37091.0472216679. The cubic root of 1375745784 is about 1112.1910524347.

The spelling of 1375745784 in words is "one billion, three hundred seventy-five million, seven hundred forty-five thousand, seven hundred eighty-four".