40390210 has 48 divisors (see below), whose sum is σ = 87333120. Its totient is φ = 13396320.

The previous prime is 40390193. The next prime is 40390211. The reversal of 40390210 is 1209304.

It is not an unprimeable number, because it can be changed into a prime (40390211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13861 + ... + 16519.

It is an arithmetic number, because the mean of its divisors is an integer number (1819440).

Almost surely, 2^40390210 is an apocalyptic number.

40390210 is an abundant number, since it is smaller than the sum of its proper divisors (46942910).

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

40390210 is a wasteful number, since it uses less digits than its factorization.

40390210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2711 (or 2704 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 40390210 is about 6355.3292597630. The cubic root of 40390210 is about 343.1036754487.

Adding to 40390210 its reverse (1209304), we get a palindrome (41599514).

The spelling of 40390210 in words is "forty million, three hundred ninety thousand, two hundred ten".