1381441248 has 72 divisors (see below), whose sum is σ = 4285617336. Its totient is φ = 418617600.

The previous prime is 1381441231. The next prime is 1381441261. The reversal of 1381441248 is 8421441831.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 214863 + ... + 221198.

It is an arithmetic number, because the mean of its divisors is an integer number (59522463).

Almost surely, 2^1381441248 is an apocalyptic number.

1381441248 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1381441248 is an abundant number, since it is smaller than the sum of its proper divisors (2904176088).

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

1381441248 is a wasteful number, since it uses less digits than its factorization.

1381441248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436088 (or 436077 counting only the distinct ones).

The product of its digits is 24576, while the sum is 36.

The square root of 1381441248 is about 37167.7447257700. The cubic root of 1381441248 is about 1113.7237296875.

The spelling of 1381441248 in words is "one billion, three hundred eighty-one million, four hundred forty-one thousand, two hundred forty-eight".