405020027636 has 24 divisors (see below), whose sum is σ = 857689471296. Its totient is φ = 163369422720.

The previous prime is 405020027609. The next prime is 405020027639. The reversal of 405020027636 is 636720020504.

It is a junction number, because it is equal to n+sod(n) for n = 405020027596 and 405020027605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405020027639) 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, 425440730 + ... + 425441681.

It is an arithmetic number, because the mean of its divisors is an integer number (35737061304).

Almost surely, 2^405020027636 is an apocalyptic number.

It is an amenable number.

405020027636 is an abundant number, since it is smaller than the sum of its proper divisors (452669443660).

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

405020027636 is a wasteful number, since it uses less digits than its factorization.

405020027636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850882439 (or 850882437 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 35.

The spelling of 405020027636 in words is "four hundred five billion, twenty million, twenty-seven thousand, six hundred thirty-six".