40313220 has 24 divisors (see below), whose sum is σ = 112877184. Its totient is φ = 10750176.

The previous prime is 40313201. The next prime is 40313243. The reversal of 40313220 is 2231304.

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 40313220.

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, 335884 + ... + 336003.

It is an arithmetic number, because the mean of its divisors is an integer number (4703216).

Almost surely, 2^40313220 is an apocalyptic number.

It is an amenable number.

40313220 is an abundant number, since it is smaller than the sum of its proper divisors (72563964).

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

40313220 is a wasteful number, since it uses less digits than its factorization.

40313220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671899 (or 671897 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 40313220 is about 6349.2692492916. The cubic root of 40313220 is about 342.8855338593.

Adding to 40313220 its reverse (2231304), we get a palindrome (42544524).

The spelling of 40313220 in words is "forty million, three hundred thirteen thousand, two hundred twenty".