40029428 has 12 divisors (see below), whose sum is σ = 73738560. Its totient is φ = 18961272.

The previous prime is 40029421. The next prime is 40029433. The reversal of 40029428 is 82492004.

40029428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 40029428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40029421) 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 3 ways as a sum of consecutive naturals, for example, 263276 + ... + 263427.

It is an arithmetic number, because the mean of its divisors is an integer number (6144880).

Almost surely, 2^40029428 is an apocalyptic number.

It is an amenable number.

40029428 is a deficient number, since it is larger than the sum of its proper divisors (33709132).

40029428 is a wasteful number, since it uses less digits than its factorization.

40029428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526726 (or 526724 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 40029428 is about 6326.8813802694. The cubic root of 40029428 is about 342.0790373966.

The spelling of 40029428 in words is "forty million, twenty-nine thousand, four hundred twenty-eight".