180487440 has 400 divisors, whose sum is σ = 751880448. Its totient is φ = 39232512.

The previous prime is 180487423. The next prime is 180487457. The reversal of 180487440 is 44784081.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (180487423) and next prime (180487457).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 180487395 and 180487404.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1043194 + ... + 1043366.

Almost surely, 2^180487440 is an apocalyptic number.

180487440 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 180487440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (375940224).

180487440 is an abundant number, since it is smaller than the sum of its proper divisors (571393008).

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

180487440 is a wasteful number, since it uses less digits than its factorization.

180487440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 180487440 is about 13434.5613996141. The cubic root of 180487440 is about 565.1308230750.

The spelling of 180487440 in words is "one hundred eighty million, four hundred eighty-seven thousand, four hundred forty".