1371281328 has 30 divisors (see below), whose sum is σ = 3837683564. Its totient is φ = 457093728.

The previous prime is 1371281323. The next prime is 1371281341. The reversal of 1371281328 is 8231821731.

1371281328 is a `hidden beast` number, since 1 + 371 + 281 + 3 + 2 + 8 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1371281292 and 1371281301.

It is not an unprimeable number, because it can be changed into a prime (1371281323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4761250 + ... + 4761537.

Almost surely, 2^1371281328 is an apocalyptic number.

1371281328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1371281328 is an abundant number, since it is smaller than the sum of its proper divisors (2466402236).

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

1371281328 is a wasteful number, since it uses less digits than its factorization.

1371281328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9522801 (or 9522792 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 1371281328 is about 37030.8159240382. The cubic root of 1371281328 is about 1110.9866853677.

The spelling of 1371281328 in words is "one billion, three hundred seventy-one million, two hundred eighty-one thousand, three hundred twenty-eight".