185220108840 has 128 divisors (see below), whose sum is σ = 633603720960. Its totient is φ = 42910715904.

The previous prime is 185220108833. The next prime is 185220108901. The reversal of 185220108840 is 48801022581.

It is a super-2 number, since 2×185220108840² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3465564 + ... + 3518603.

It is an arithmetic number, because the mean of its divisors is an integer number (4950029070).

Almost surely, 2^185220108840 is an apocalyptic number.

185220108840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

185220108840 is an abundant number, since it is smaller than the sum of its proper divisors (448383612120).

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

185220108840 is a wasteful number, since it uses less digits than its factorization.

185220108840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6984211 (or 6984207 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 39.

The spelling of 185220108840 in words is "one hundred eighty-five billion, two hundred twenty million, one hundred eight thousand, eight hundred forty".