42020646 has 16 divisors (see below), whose sum is σ = 84874608. Its totient is φ = 13868000.

The previous prime is 42020639. The next prime is 42020669. The reversal of 42020646 is 64602024.

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, 34065 + ... + 35276.

It is an arithmetic number, because the mean of its divisors is an integer number (5304663).

Almost surely, 2^42020646 is an apocalyptic number.

42020646 is an abundant number, since it is smaller than the sum of its proper divisors (42853962).

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

42020646 is a wasteful number, since it uses less digits than its factorization.

42020646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69447.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 42020646 is about 6482.3333761848. Note that the first 4 decimals coincide. The cubic root of 42020646 is about 347.6596123378.

The spelling of 42020646 in words is "forty-two million, twenty thousand, six hundred forty-six".