210949128 has 48 divisors (see below), whose sum is σ = 615271020. Its totient is φ = 64907136.

The previous prime is 210949097. The next prime is 210949133. The reversal of 210949128 is 821949012.

It can be written as a sum of positive squares in 2 ways, for example, as 208571364 + 2377764 = 14442^2 + 1542^2 .

It is a super-3 number, since 3×210949128³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 210949092 and 210949101.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111751 + ... + 113622.

Almost surely, 2^210949128 is an apocalyptic number.

It is an amenable number.

210949128 is an abundant number, since it is smaller than the sum of its proper divisors (404321892).

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

210949128 is a wasteful number, since it uses less digits than its factorization.

210949128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225398 (or 225391 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 210949128 is about 14524.0878543198. The cubic root of 210949128 is about 595.2863325386.

The spelling of 210949128 in words is "two hundred ten million, nine hundred forty-nine thousand, one hundred twenty-eight".