210540728 has 16 divisors (see below), whose sum is σ = 403945080. Its totient is φ = 102822048.

The previous prime is 210540721. The next prime is 210540739. The reversal of 210540728 is 827045012.

210540728 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 210540728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210540721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305675 + ... + 306362.

Almost surely, 2^210540728 is an apocalyptic number.

It is an amenable number.

210540728 is a deficient number, since it is larger than the sum of its proper divisors (193404352).

210540728 is a wasteful number, since it uses less digits than its factorization.

210540728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612086 (or 612082 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 210540728 is about 14510.0216402320. The cubic root of 210540728 is about 594.9019239048.

The spelling of 210540728 in words is "two hundred ten million, five hundred forty thousand, seven hundred twenty-eight".