406785136 has 20 divisors (see below), whose sum is σ = 829628200. Its totient is φ = 192687552.

The previous prime is 406785133. The next prime is 406785139. The reversal of 406785136 is 631587604.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (406785133) and next prime (406785139).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406785133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 668751 + ... + 669358.

It is an arithmetic number, because the mean of its divisors is an integer number (41481410).

Almost surely, 2^406785136 is an apocalyptic number.

It is an amenable number.

406785136 is an abundant number, since it is smaller than the sum of its proper divisors (422843064).

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

406785136 is a wasteful number, since it uses less digits than its factorization.

406785136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338136 (or 1338130 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 406785136 is about 20168.9150922899. The cubic root of 406785136 is about 740.9490720157.

The spelling of 406785136 in words is "four hundred six million, seven hundred eighty-five thousand, one hundred thirty-six".