42023649 has 12 divisors (see below), whose sum is σ = 59137296. Its totient is φ = 26540568.

The previous prime is 42023633. The next prime is 42023659. The reversal of 42023649 is 94632024.

It is not a de Polignac number, because 42023649 - 2⁴ = 42023633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42023659) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 18319 + ... + 20484.

It is an arithmetic number, because the mean of its divisors is an integer number (4928108).

Almost surely, 2^42023649 is an apocalyptic number.

It is an amenable number.

42023649 is a deficient number, since it is larger than the sum of its proper divisors (17113647).

42023649 is a wasteful number, since it uses less digits than its factorization.

42023649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38844 (or 38825 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 42023649 is about 6482.5650016024. The cubic root of 42023649 is about 347.6678939568.

The spelling of 42023649 in words is "forty-two million, twenty-three thousand, six hundred forty-nine".