210023240 has 32 divisors (see below), whose sum is σ = 540060480. Its totient is φ = 72007872.

The previous prime is 210023239. The next prime is 210023243. The reversal of 210023240 is 42320012.

It is a super-2 number, since 2×210023240² = 88219522680195200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (210023243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374762 + ... + 375321.

It is an arithmetic number, because the mean of its divisors is an integer number (16876890).

Almost surely, 2^210023240 is an apocalyptic number.

210023240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210023240 is an abundant number, since it is smaller than the sum of its proper divisors (330037240).

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

210023240 is a wasteful number, since it uses less digits than its factorization.

210023240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750101 (or 750097 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 210023240 is about 14492.1785801859. The cubic root of 210023240 is about 594.4141209352.

Adding to 210023240 its reverse (42320012), we get a palindrome (252343252).

It can be divided in two parts, 21002 and 3240, that added together give a palindrome (24242).

The spelling of 210023240 in words is "two hundred ten million, twenty-three thousand, two hundred forty".