40228020 has 108 divisors (see below), whose sum is σ = 141978564. Its totient is φ = 9192960.

The previous prime is 40227983. The next prime is 40228043. The reversal of 40228020 is 2082204.

40228020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 13972644 + 26255376 = 3738^2 + 5124^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 40227984 and 40228002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6540 + ... + 11100.

Almost surely, 2^40228020 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 40228020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70989282).

40228020 is an abundant number, since it is smaller than the sum of its proper divisors (101750544).

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

40228020 is a wasteful number, since it uses less digits than its factorization.

40228020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4590 (or 4578 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 40228020 is about 6342.5562669952. The cubic root of 40228020 is about 342.6438062708.

The spelling of 40228020 in words is "forty million, two hundred twenty-eight thousand, twenty".