40428238 has 32 divisors (see below), whose sum is σ = 65888640. Its totient is φ = 18545760.

The previous prime is 40428217. The next prime is 40428239. The reversal of 40428238 is 83282404.

40428238 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40428239) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 247945 + ... + 248107.

It is an arithmetic number, because the mean of its divisors is an integer number (2059020).

Almost surely, 2^40428238 is an apocalyptic number.

40428238 is a deficient number, since it is larger than the sum of its proper divisors (25460402).

40428238 is a wasteful number, since it uses less digits than its factorization.

40428238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352.

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 40428238 is about 6358.3203756967. The cubic root of 40428238 is about 343.2113207905.

The spelling of 40428238 in words is "forty million, four hundred twenty-eight thousand, two hundred thirty-eight".