40393220 has 48 divisors (see below), whose sum is σ = 97870080. Its totient is φ = 13716864.

The previous prime is 40393189. The next prime is 40393237. The reversal of 40393220 is 2239304.

It is a super-2 number, since 2×40393220² = 3263224443936800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13937 + ... + 16583.

It is an arithmetic number, because the mean of its divisors is an integer number (2038960).

Almost surely, 2^40393220 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 40393220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48935040).

40393220 is an abundant number, since it is smaller than the sum of its proper divisors (57476860).

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

40393220 is a wasteful number, since it uses less digits than its factorization.

40393220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2772 (or 2770 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 40393220 is about 6355.5660644824. The cubic root of 40393220 is about 343.1121982764.

The spelling of 40393220 in words is "forty million, three hundred ninety-three thousand, two hundred twenty".