185838220040 has 64 divisors (see below), whose sum is σ = 457024446720. Its totient is φ = 67447744000.

The previous prime is 185838220037. The next prime is 185838220067. The reversal of 185838220040 is 40022838581.

It is a self number, because there is not a number n which added to its sum of digits gives 185838220040.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176096 + ... + 634575.

It is an arithmetic number, because the mean of its divisors is an integer number (7141006980).

Almost surely, 2^185838220040 is an apocalyptic number.

185838220040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

185838220040 is an abundant number, since it is smaller than the sum of its proper divisors (271186226680).

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

185838220040 is a wasteful number, since it uses less digits than its factorization.

185838220040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811214 (or 811210 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 41.

The spelling of 185838220040 in words is "one hundred eighty-five billion, eight hundred thirty-eight million, two hundred twenty thousand, forty".