42623643 has 16 divisors (see below), whose sum is σ = 58254336. Its totient is φ = 27713280.

The previous prime is 42623639. The next prime is 42623663. The reversal of 42623643 is 34632624.

It is a happy number.

It is not a de Polignac number, because 42623643 - 2² = 42623639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42623643.

It is not an unprimeable number, because it can be changed into a prime (42623663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19630 + ... + 21692.

It is an arithmetic number, because the mean of its divisors is an integer number (3640896).

Almost surely, 2^42623643 is an apocalyptic number.

42623643 is a deficient number, since it is larger than the sum of its proper divisors (15630693).

42623643 is a wasteful number, since it uses less digits than its factorization.

42623643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234.

The product of its digits is 20736, while the sum is 30.

The square root of 42623643 is about 6528.6785033420. The cubic root of 42623643 is about 349.3146944106.

The spelling of 42623643 in words is "forty-two million, six hundred twenty-three thousand, six hundred forty-three".