40240220 has 12 divisors (see below), whose sum is σ = 84504504. Its totient is φ = 16096080.

The previous prime is 40240181. The next prime is 40240223. The reversal of 40240220 is 2204204.

It is a happy number.

It is a hoax number, since the sum of its digits (14) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 40240195 and 40240204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40240223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1005986 + ... + 1006025.

It is an arithmetic number, because the mean of its divisors is an integer number (7042042).

Almost surely, 2^40240220 is an apocalyptic number.

It is an amenable number.

40240220 is an abundant number, since it is smaller than the sum of its proper divisors (44264284).

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

40240220 is a wasteful number, since it uses less digits than its factorization.

40240220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012020 (or 2012018 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 40240220 is about 6343.5179514210. The cubic root of 40240220 is about 342.6784407696.

Adding to 40240220 its reverse (2204204), we get a palindrome (42444424).

The spelling of 40240220 in words is "forty million, two hundred forty thousand, two hundred twenty".