180138040 has 32 divisors (see below), whose sum is σ = 406100880. Its totient is φ = 71914752.

The previous prime is 180138037. The next prime is 180138059. The reversal of 180138040 is 40831081.

It is a junction number, because it is equal to n+sod(n) for n = 180137996 and 180138014.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17764 + ... + 25996.

Almost surely, 2^180138040 is an apocalyptic number.

180138040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

180138040 is an abundant number, since it is smaller than the sum of its proper divisors (225962840).

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

180138040 is a wasteful number, since it uses less digits than its factorization.

180138040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8791 (or 8787 counting only the distinct ones).

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

The square root of 180138040 is about 13421.5513261322. The cubic root of 180138040 is about 564.7659144632.

The spelling of 180138040 in words is "one hundred eighty million, one hundred thirty-eight thousand, forty".