210728464 has 40 divisors (see below), whose sum is σ = 433686528. Its totient is φ = 98849280.

The previous prime is 210728437. The next prime is 210728569. The reversal of 210728464 is 464827012.

It is a happy number.

210728464 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98769 + ... + 100879.

Almost surely, 2^210728464 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 210728464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216843264).

210728464 is an abundant number, since it is smaller than the sum of its proper divisors (222958064).

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

210728464 is a wasteful number, since it uses less digits than its factorization.

210728464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2503 (or 2497 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 210728464 is about 14516.4893827674. The cubic root of 210728464 is about 595.0786930732.

The spelling of 210728464 in words is "two hundred ten million, seven hundred twenty-eight thousand, four hundred sixty-four".