1381591260 has 324 divisors, whose sum is σ = 5068279944. Its totient is φ = 303730560.

The previous prime is 1381591243. The next prime is 1381591271. The reversal of 1381591260 is 621951831.

1381591260 = T₃₉₉ + T₄₀₀ + ... + T₂₀₂₈.

1381591260 is a `hidden beast` number, since 1 + 3 + 8 + 1 + 591 + 2 + 60 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 8475939 + ... + 8476101.

Almost surely, 2^1381591260 is an apocalyptic number.

1381591260 is a gapful number since it is divisible by the number (10) 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 1381591260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2534139972).

1381591260 is an abundant number, since it is smaller than the sum of its proper divisors (3686688684).

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

1381591260 is a wasteful number, since it uses less digits than its factorization.

1381591260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 1381591260 is about 37169.7627111070. The cubic root of 1381591260 is about 1113.7640416630.

The spelling of 1381591260 in words is "one billion, three hundred eighty-one million, five hundred ninety-one thousand, two hundred sixty".