210028990 has 8 divisors (see below), whose sum is σ = 378052200. Its totient is φ = 84011592.

The previous prime is 210028943. The next prime is 210028997. The reversal of 210028990 is 99820012.

210028990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×210028990² = 88224353280840200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210028997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10501440 + ... + 10501459.

It is an arithmetic number, because the mean of its divisors is an integer number (47256525).

Almost surely, 2^210028990 is an apocalyptic number.

210028990 is a deficient number, since it is larger than the sum of its proper divisors (168023210).

210028990 is a wasteful number, since it uses less digits than its factorization.

210028990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21002906.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 210028990 is about 14492.3769616996. The cubic root of 210028990 is about 594.4195454936.

It can be divided in two parts, 21002 and 8990, that added together give a palindrome (29992).

The spelling of 210028990 in words is "two hundred ten million, twenty-eight thousand, nine hundred ninety".