40020210 has 64 divisors (see below), whose sum is σ = 113011200. Its totient is φ = 10043136.

The previous prime is 40020191. The next prime is 40020221. The reversal of 40020210 is 1202004.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 40020192 and 40020201.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 231 + ... + 8949.

It is an arithmetic number, because the mean of its divisors is an integer number (1765800).

Almost surely, 2^40020210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40020210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56505600).

40020210 is an abundant number, since it is smaller than the sum of its proper divisors (72990990).

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

40020210 is a wasteful number, since it uses less digits than its factorization.

40020210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8752 (or 8746 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 40020210 is about 6326.1528593609. The cubic root of 40020210 is about 342.0527773275.

Adding to 40020210 its reverse (1202004), we get a palindrome (41222214).

The spelling of 40020210 in words is "forty million, twenty thousand, two hundred ten".