180421838 has 8 divisors (see below), whose sum is σ = 271076088. Its totient is φ = 90063144.

The previous prime is 180421837. The next prime is 180421883. The reversal of 180421838 is 838124081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 180421798 and 180421807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180421837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72356 + ... + 74807.

It is an arithmetic number, because the mean of its divisors is an integer number (33884511).

Almost surely, 2^180421838 is an apocalyptic number.

180421838 is a deficient number, since it is larger than the sum of its proper divisors (90654250).

180421838 is a wasteful number, since it uses less digits than its factorization.

180421838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147778.

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 180421838 is about 13432.1196391337. The cubic root of 180421838 is about 565.0623451708.

The spelling of 180421838 in words is "one hundred eighty million, four hundred twenty-one thousand, eight hundred thirty-eight".