180421856 has 12 divisors (see below), whose sum is σ = 355205592. Its totient is φ = 90210912.

The previous prime is 180421837. The next prime is 180421883. The reversal of 180421856 is 658124081.

It is a super-2 number, since 2×180421856² = 65104092244969472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2819060 + ... + 2819123.

It is an arithmetic number, because the mean of its divisors is an integer number (29600466).

Almost surely, 2^180421856 is an apocalyptic number.

180421856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

180421856 is a deficient number, since it is larger than the sum of its proper divisors (174783736).

180421856 is an equidigital number, since it uses as much as digits as its factorization.

180421856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5638193 (or 5638185 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 180421856 is about 13432.1203091694. The cubic root of 180421856 is about 565.0623639622.

The spelling of 180421856 in words is "one hundred eighty million, four hundred twenty-one thousand, eight hundred fifty-six".