728214380 has 24 divisors (see below), whose sum is σ = 1619206848. Its totient is φ = 274151168.

The previous prime is 728214371. The next prime is 728214391. The reversal of 728214380 is 83412827.

It is a self number, because there is not a number n which added to its sum of digits gives 728214380.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1070564 + ... + 1071243.

It is an arithmetic number, because the mean of its divisors is an integer number (67466952).

Almost surely, 2^728214380 is an apocalyptic number.

It is an amenable number.

728214380 is an abundant number, since it is smaller than the sum of its proper divisors (890992468).

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

728214380 is a wasteful number, since it uses less digits than its factorization.

728214380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2141833 (or 2141831 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 728214380 is about 26985.4475597497. The cubic root of 728214380 is about 899.6765833821.

The spelling of 728214380 in words is "seven hundred twenty-eight million, two hundred fourteen thousand, three hundred eighty".