40330290 has 256 divisors, whose sum is σ = 139345920. Its totient is φ = 7188480.

The previous prime is 40330289. The next prime is 40330291. The reversal of 40330290 is 9203304.

It is an interprime number because it is at equal distance from previous prime (40330289) and next prime (40330291).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40330291) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 510471 + ... + 510549.

It is an arithmetic number, because the mean of its divisors is an integer number (544320).

Almost surely, 2^40330290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40330290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69672960).

40330290 is an abundant number, since it is smaller than the sum of its proper divisors (99015630).

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

40330290 is a wasteful number, since it uses less digits than its factorization.

40330290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 40330290 is about 6350.6133562043. The cubic root of 40330290 is about 342.9339235284.

Adding to 40330290 its reverse (9203304), we get a palindrome (49533594).

The spelling of 40330290 in words is "forty million, three hundred thirty thousand, two hundred ninety".