40220420 has 12 divisors (see below), whose sum is σ = 84462924. Its totient is φ = 16088160.

The previous prime is 40220407. The next prime is 40220441. The reversal of 40220420 is 2402204.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15856324 + 24364096 = 3982^2 + 4936^2 .

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 = 40220395 and 40220404.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1005491 + ... + 1005530.

It is an arithmetic number, because the mean of its divisors is an integer number (7038577).

Almost surely, 2^40220420 is an apocalyptic number.

It is an amenable number.

40220420 is an abundant number, since it is smaller than the sum of its proper divisors (44242504).

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

40220420 is a wasteful number, since it uses less digits than its factorization.

40220420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011030 (or 2011028 counting only the distinct ones).

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

The square root of 40220420 is about 6341.9571111763. The cubic root of 40220420 is about 342.6222271415.

Adding to 40220420 its reverse (2402204), we get a palindrome (42622624).

The spelling of 40220420 in words is "forty million, two hundred twenty thousand, four hundred twenty".