42003820 has 12 divisors (see below), whose sum is σ = 88208064. Its totient is φ = 16801520.

The previous prime is 42003799. The next prime is 42003833. The reversal of 42003820 is 2830024.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050076 + ... + 1050115.

It is an arithmetic number, because the mean of its divisors is an integer number (7350672).

Almost surely, 2^42003820 is an apocalyptic number.

It is an amenable number.

42003820 is an abundant number, since it is smaller than the sum of its proper divisors (46204244).

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

42003820 is a wasteful number, since it uses less digits than its factorization.

42003820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100200 (or 2100198 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 42003820 is about 6481.0354111052. The cubic root of 42003820 is about 347.6132025991.

Adding to 42003820 its reverse (2830024), we get a palindrome (44833844).

The spelling of 42003820 in words is "forty-two million, three thousand, eight hundred twenty".