1438603684281 has 12 divisors (see below), whose sum is σ = 2088531239652. Its totient is φ = 954200750496.

The previous prime is 1438603684253. The next prime is 1438603684307. The reversal of 1438603684281 is 1824863068341.

It is a happy number.

1438603684281 is a `hidden beast` number, since 1 + 4 + 3 + 8 + 603 + 6 + 8 + 4 + 28 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 970193480256 + 468410204025 = 984984^2 + 684405^2 .

It is not a de Polignac number, because 1438603684281 - 2⁷ = 1438603684153 is a prime.

It is a super-2 number, since 2×1438603684281² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1438603684211) 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, 405695826 + ... + 405699371.

It is an arithmetic number, because the mean of its divisors is an integer number (174044269971).

Almost surely, 2^{1438603684281} is an apocalyptic number.

It is an amenable number.

1438603684281 is a deficient number, since it is larger than the sum of its proper divisors (649927555371).

1438603684281 is a wasteful number, since it uses less digits than its factorization.

1438603684281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811395400 (or 811395397 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 54.

The spelling of 1438603684281 in words is "one trillion, four hundred thirty-eight billion, six hundred three million, six hundred eighty-four thousand, two hundred eighty-one".