42820928 has 14 divisors (see below), whose sum is σ = 84972906. Its totient is φ = 21410432.

The previous prime is 42820903. The next prime is 42820937. The reversal of 42820928 is 82902824.

It can be written as a sum of positive squares in only one way, i.e., 34480384 + 8340544 = 5872^2 + 2888^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334475 + ... + 334602.

Almost surely, 2^42820928 is an apocalyptic number.

It is an amenable number.

42820928 is a deficient number, since it is larger than the sum of its proper divisors (42151978).

42820928 is an equidigital number, since it uses as much as digits as its factorization.

42820928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669089 (or 669079 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 42820928 is about 6543.7701671131. The cubic root of 42820928 is about 349.8528034096.

The spelling of 42820928 in words is "forty-two million, eight hundred twenty thousand, nine hundred twenty-eight".