210040028 has 18 divisors (see below), whose sum is σ = 404024208. Its totient is φ = 95472520.

The previous prime is 210040027. The next prime is 210040067. The reversal of 210040028 is 820040012.

210040028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 210039988 and 210040015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210040027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 216500 + ... + 217467.

Almost surely, 2^210040028 is an apocalyptic number.

It is an amenable number.

210040028 is a deficient number, since it is larger than the sum of its proper divisors (193984180).

210040028 is a wasteful number, since it uses less digits than its factorization.

210040028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433993 (or 433980 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 210040028 is about 14492.7577775936. The cubic root of 210040028 is about 594.4299584815.

The spelling of 210040028 in words is "two hundred ten million, forty thousand, twenty-eight".