42940728 has 24 divisors (see below), whose sum is σ = 116298000. Its totient is φ = 14313552.

The previous prime is 42940721. The next prime is 42940823. The reversal of 42940728 is 82704924.

42940728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×42940728² = 3687812242339968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 42940692 and 42940701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42940721) 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 5 ways as a sum of consecutive naturals, for example, 298128 + ... + 298271.

It is an arithmetic number, because the mean of its divisors is an integer number (4845750).

Almost surely, 2^42940728 is an apocalyptic number.

It is an amenable number.

42940728 is an abundant number, since it is smaller than the sum of its proper divisors (73357272).

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

42940728 is a wasteful number, since it uses less digits than its factorization.

42940728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596411 (or 596404 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 42940728 is about 6552.9175181746. The cubic root of 42940728 is about 350.1787603844.

The spelling of 42940728 in words is "forty-two million, nine hundred forty thousand, seven hundred twenty-eight".