42355820 has 24 divisors (see below), whose sum is σ = 95789904. Its totient is φ = 15638976.

The previous prime is 42355801. The next prime is 42355847. The reversal of 42355820 is 2855324.

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, 81194 + ... + 81713.

It is an arithmetic number, because the mean of its divisors is an integer number (3991246).

Almost surely, 2^42355820 is an apocalyptic number.

It is an amenable number.

42355820 is an abundant number, since it is smaller than the sum of its proper divisors (53434084).

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

42355820 is a wasteful number, since it uses less digits than its factorization.

42355820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162929 (or 162927 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 42355820 is about 6508.1349094806. The cubic root of 42355820 is about 348.5815242914.

The spelling of 42355820 in words is "forty-two million, three hundred fifty-five thousand, eight hundred twenty".