40304220 has 96 divisors (see below), whose sum is σ = 124830720. Its totient is φ = 9634560.

The previous prime is 40304213. The next prime is 40304227. The reversal of 40304220 is 2240304.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (40304213) and next prime (40304227).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 40304220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40304227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51754 + ... + 52526.

It is an arithmetic number, because the mean of its divisors is an integer number (1300320).

Almost surely, 2^40304220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40304220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62415360).

40304220 is an abundant number, since it is smaller than the sum of its proper divisors (84526500).

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

40304220 is a wasteful number, since it uses less digits than its factorization.

40304220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875 (or 873 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 40304220 is about 6348.5604667515. The cubic root of 40304220 is about 342.8600153529.

Adding to 40304220 its reverse (2240304), we get a palindrome (42544524).

The spelling of 40304220 in words is "forty million, three hundred four thousand, two hundred twenty".