1408135636 has 24 divisors (see below), whose sum is σ = 2613098880. Its totient is φ = 661660032.

The previous prime is 1408135621. The next prime is 1408135649. The reversal of 1408135636 is 6365318041.

It is a junction number, because it is equal to n+sod(n) for n = 1408135595 and 1408135604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31285 + ... + 61603.

It is an arithmetic number, because the mean of its divisors is an integer number (108879120).

Almost surely, 2^1408135636 is an apocalyptic number.

It is an amenable number.

1408135636 is a deficient number, since it is larger than the sum of its proper divisors (1204963244).

1408135636 is a wasteful number, since it uses less digits than its factorization.

1408135636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31023 (or 31021 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 1408135636 is about 37525.1333908355. The cubic root of 1408135636 is about 1120.8517213913.

The spelling of 1408135636 in words is "one billion, four hundred eight million, one hundred thirty-five thousand, six hundred thirty-six".