180447240 has 64 divisors (see below), whose sum is σ = 548784000. Its totient is φ = 47457792.

The previous prime is 180447227. The next prime is 180447271. The reversal of 180447240 is 42744081.

It is a super-2 number, since 2×180447240² = 65122412847235200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 180447198 and 180447207.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1540 + ... + 19059.

It is an arithmetic number, because the mean of its divisors is an integer number (8574750).

Almost surely, 2^180447240 is an apocalyptic number.

180447240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 180447240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274392000).

180447240 is an abundant number, since it is smaller than the sum of its proper divisors (368336760).

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

180447240 is a wasteful number, since it uses less digits than its factorization.

180447240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20686 (or 20682 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 180447240 is about 13433.0651751564. The cubic root of 180447240 is about 565.0888627296.

The spelling of 180447240 in words is "one hundred eighty million, four hundred forty-seven thousand, two hundred forty".