40302220 has 24 divisors (see below), whose sum is σ = 96725664. Its totient is φ = 13817856.

The previous prime is 40302217. The next prime is 40302247. The reversal of 40302220 is 2220304.

It is a self number, because there is not a number n which added to its sum of digits gives 40302220.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143797 + ... + 144076.

It is an arithmetic number, because the mean of its divisors is an integer number (4030236).

Almost surely, 2^40302220 is an apocalyptic number.

It is an amenable number.

40302220 is an abundant number, since it is smaller than the sum of its proper divisors (56423444).

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

40302220 is a wasteful number, since it uses less digits than its factorization.

40302220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287889 (or 287887 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 40302220 is about 6348.4029487738. The cubic root of 40302220 is about 342.8543440578.

Adding to 40302220 its reverse (2220304), we get a palindrome (42522524).

The spelling of 40302220 in words is "forty million, three hundred two thousand, two hundred twenty".