42640622 has 4 divisors (see below), whose sum is σ = 63960936. Its totient is φ = 21320310.

The previous prime is 42640603. The next prime is 42640639. The reversal of 42640622 is 22604624.

42640622 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 42640591 and 42640600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660154 + ... + 10660157.

It is an arithmetic number, because the mean of its divisors is an integer number (15990234).

Almost surely, 2^42640622 is an apocalyptic number.

42640622 is a deficient number, since it is larger than the sum of its proper divisors (21320314).

42640622 is a wasteful number, since it uses less digits than its factorization.

42640622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21320313.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 42640622 is about 6529.9787135947. The cubic root of 42640622 is about 349.3610710725.

The spelling of 42640622 in words is "forty-two million, six hundred forty thousand, six hundred twenty-two".