1405134636 has 24 divisors (see below), whose sum is σ = 3279494064. Its totient is φ = 468257280.

The previous prime is 1405134589. The next prime is 1405134637. The reversal of 1405134636 is 6364315041.

It is a junction number, because it is equal to n+sod(n) for n = 1405134597 and 1405134606.

It is not an unprimeable number, because it can be changed into a prime (1405134637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41896 + ... + 67568.

It is an arithmetic number, because the mean of its divisors is an integer number (136645586).

Almost surely, 2^1405134636 is an apocalyptic number.

It is an amenable number.

1405134636 is an abundant number, since it is smaller than the sum of its proper divisors (1874359428).

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

1405134636 is a wasteful number, since it uses less digits than its factorization.

1405134636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30241 (or 30239 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 1405134636 is about 37485.1255300019. The cubic root of 1405134636 is about 1120.0549069596.

Adding to 1405134636 its reverse (6364315041), we get a palindrome (7769449677).

The spelling of 1405134636 in words is "one billion, four hundred five million, one hundred thirty-four thousand, six hundred thirty-six".