1243876536 has 96 divisors (see below), whose sum is σ = 4076598240. Its totient is φ = 334485504.

The previous prime is 1243876531. The next prime is 1243876577. The reversal of 1243876536 is 6356783421.

1243876536 is a `hidden beast` number, since 1 + 2 + 43 + 8 + 76 + 536 = 666.

It is a super-2 number, since 2×1243876536² = 3094457673622718592, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1243876491 and 1243876500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243876531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64021 + ... + 81156.

It is an arithmetic number, because the mean of its divisors is an integer number (42464565).

Almost surely, 2^1243876536 is an apocalyptic number.

It is an amenable number.

1243876536 is an abundant number, since it is smaller than the sum of its proper divisors (2832721704).

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

1243876536 is a wasteful number, since it uses less digits than its factorization.

1243876536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145213 (or 145206 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 1243876536 is about 35268.6338833814. The cubic root of 1243876536 is about 1075.4554510692.

The spelling of 1243876536 in words is "one billion, two hundred forty-three million, eight hundred seventy-six thousand, five hundred thirty-six".