210840472 has 16 divisors (see below), whose sum is σ = 396158400. Its totient is φ = 105198240.

The previous prime is 210840437. The next prime is 210840499. The reversal of 210840472 is 274048012.

210840472 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 210840472.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23679 + ... + 31342.

It is an arithmetic number, because the mean of its divisors is an integer number (24759900).

Almost surely, 2^210840472 is an apocalyptic number.

It is an amenable number.

210840472 is a deficient number, since it is larger than the sum of its proper divisors (185317928).

210840472 is a wasteful number, since it uses less digits than its factorization.

210840472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55506 (or 55502 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 210840472 is about 14520.3468278137. The cubic root of 210840472 is about 595.1841079866.

Adding to 210840472 its reverse (274048012), we get a palindrome (484888484).

The spelling of 210840472 in words is "two hundred ten million, eight hundred forty thousand, four hundred seventy-two".