1381622256 has 60 divisors (see below), whose sum is σ = 4419001392. Its totient is φ = 394748928.

The previous prime is 1381622243. The next prime is 1381622257. The reversal of 1381622256 is 6522261831.

1381622256 is a `hidden beast` number, since 1 + 3 + 8 + 1 + 622 + 25 + 6 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1381622256.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381622257) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 684321 + ... + 686336.

Almost surely, 2^1381622256 is an apocalyptic number.

1381622256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1381622256 is an abundant number, since it is smaller than the sum of its proper divisors (3037379136).

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

1381622256 is a wasteful number, since it uses less digits than its factorization.

1381622256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370678 (or 1370669 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 1381622256 is about 37170.1796605828. The cubic root of 1381622256 is about 1113.7723706995.

The spelling of 1381622256 in words is "one billion, three hundred eighty-one million, six hundred twenty-two thousand, two hundred fifty-six".