42820072 has 32 divisors (see below), whose sum is σ = 86587200. Its totient is φ = 19785600.

The previous prime is 42820069. The next prime is 42820079. The reversal of 42820072 is 27002824.

It is not an unprimeable number, because it can be changed into a prime (42820079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2797 + ... + 9667.

It is an arithmetic number, because the mean of its divisors is an integer number (2705850).

Almost surely, 2^42820072 is an apocalyptic number.

It is an amenable number.

42820072 is an abundant number, since it is smaller than the sum of its proper divisors (43767128).

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

42820072 is a wasteful number, since it uses less digits than its factorization.

42820072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6937 (or 6933 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 42820072 is about 6543.7047610662. The cubic root of 42820072 is about 349.8504721819.

Adding to 42820072 its reverse (27002824), we get a palindrome (69822896).

The spelling of 42820072 in words is "forty-two million, eight hundred twenty thousand, seventy-two".