42644590 has 16 divisors (see below), whose sum is σ = 77153472. Its totient is φ = 16970464.

The previous prime is 42644579. The next prime is 42644593. The reversal of 42644590 is 9544624.

42644590 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×42644590² = 3637122112536200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42644593) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 8854 + ... + 12793.

It is an arithmetic number, because the mean of its divisors is an integer number (4822092).

Almost surely, 2^42644590 is an apocalyptic number.

42644590 is a deficient number, since it is larger than the sum of its proper divisors (34508882).

42644590 is a wasteful number, since it uses less digits than its factorization.

42644590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21851.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 42644590 is about 6530.2825360010. The cubic root of 42644590 is about 349.3719075446.

Adding to 42644590 its sum of digits (34), we get a palindrome (42644624).

It can be divided in two parts, 42644 and 590, that added together give a palindrome (43234).

The spelling of 42644590 in words is "forty-two million, six hundred forty-four thousand, five hundred ninety".