180400138 has 8 divisors (see below), whose sum is σ = 272112480. Its totient is φ = 89695980.

The previous prime is 180400127. The next prime is 180400159. The reversal of 180400138 is 831004081.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251598 + ... + 252313.

It is an arithmetic number, because the mean of its divisors is an integer number (34014060).

Almost surely, 2^180400138 is an apocalyptic number.

180400138 is a deficient number, since it is larger than the sum of its proper divisors (91712342).

180400138 is a wasteful number, since it uses less digits than its factorization.

180400138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504092.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 180400138 is about 13431.3118495551. The cubic root of 180400138 is about 565.0396902183.

The spelling of 180400138 in words is "one hundred eighty million, four hundred thousand, one hundred thirty-eight".