210720412 has 24 divisors (see below), whose sum is σ = 443623040. Its totient is φ = 85555440.

The previous prime is 210720407. The next prime is 210720437. The reversal of 210720412 is 214027012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 210720412.

It is a congruent number.

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, 197514 + ... + 198577.

Almost surely, 2^210720412 is an apocalyptic number.

It is an amenable number.

210720412 is an abundant number, since it is smaller than the sum of its proper divisors (232902628).

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

210720412 is a wasteful number, since it uses less digits than its factorization.

210720412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396121 (or 396119 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 210720412 is about 14516.2120403361. The cubic root of 210720412 is about 595.0711135962.

Adding to 210720412 its reverse (214027012), we get a palindrome (424747424).

The spelling of 210720412 in words is "two hundred ten million, seven hundred twenty thousand, four hundred twelve".