42809620 has 24 divisors (see below), whose sum is σ = 102743424. Its totient is φ = 14677536.

The previous prime is 42809593. The next prime is 42809651. The reversal of 42809620 is 2690824.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152752 + ... + 153031.

It is an arithmetic number, because the mean of its divisors is an integer number (4280976).

Almost surely, 2^42809620 is an apocalyptic number.

It is an amenable number.

42809620 is an abundant number, since it is smaller than the sum of its proper divisors (59933804).

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

42809620 is a wasteful number, since it uses less digits than its factorization.

42809620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305799 (or 305797 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 42809620 is about 6542.9060821626. The cubic root of 42809620 is about 349.8220047325.

The spelling of 42809620 in words is "forty-two million, eight hundred nine thousand, six hundred twenty".