728622180 has 144 divisors (see below), whose sum is σ = 2596636224. Its totient is φ = 163042560.

The previous prime is 728622173. The next prime is 728622239. The reversal of 728622180 is 81226827.

It is a happy number.

728622180 is a `hidden beast` number, since 7 + 28 + 622 + 1 + 8 + 0 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11587 + ... + 39893.

It is an arithmetic number, because the mean of its divisors is an integer number (18032196).

Almost surely, 2^728622180 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 728622180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1298318112).

728622180 is an abundant number, since it is smaller than the sum of its proper divisors (1868014044).

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

728622180 is a wasteful number, since it uses less digits than its factorization.

728622180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28346 (or 28341 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 728622180 is about 26993.0024265549. The cubic root of 728622180 is about 899.8444916502.

The spelling of 728622180 in words is "seven hundred twenty-eight million, six hundred twenty-two thousand, one hundred eighty".