1381147548 has 48 divisors (see below), whose sum is σ = 3531077760. Its totient is φ = 416692800.

The previous prime is 1381147529. The next prime is 1381147561. The reversal of 1381147548 is 8457411831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7383 + ... + 53073.

It is an arithmetic number, because the mean of its divisors is an integer number (73564120).

Almost surely, 2^1381147548 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1381147548, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1765538880).

1381147548 is an abundant number, since it is smaller than the sum of its proper divisors (2149930212).

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

1381147548 is a wasteful number, since it uses less digits than its factorization.

1381147548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45938 (or 45936 counting only the distinct ones).

The product of its digits is 107520, while the sum is 42.

The square root of 1381147548 is about 37163.7935092746. The cubic root of 1381147548 is about 1113.6447967027.

The spelling of 1381147548 in words is "one billion, three hundred eighty-one million, one hundred forty-seven thousand, five hundred forty-eight".