180781040 has 40 divisors (see below), whose sum is σ = 458528688. Its totient is φ = 65738240.

The previous prime is 180781033. The next prime is 180781063. The reversal of 180781040 is 40187081.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 180780994 and 180781012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101837 + ... + 103596.

Almost surely, 2^180781040 is an apocalyptic number.

180781040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

180781040 is an abundant number, since it is smaller than the sum of its proper divisors (277747648).

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

180781040 is a wasteful number, since it uses less digits than its factorization.

180781040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205457 (or 205451 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 180781040 is about 13445.4840002136. The cubic root of 180781040 is about 565.4370909643.

The spelling of 180781040 in words is "one hundred eighty million, seven hundred eighty-one thousand, forty".