42638629 has 8 divisors (see below), whose sum is σ = 46927872. Its totient is φ = 38418240.

The previous prime is 42638627. The next prime is 42638633. The reversal of 42638629 is 92683624.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42638629 - 2¹ = 42638627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42638591 and 42638600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42638623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15909 + ... + 18394.

It is an arithmetic number, because the mean of its divisors is an integer number (5865984).

Almost surely, 2^42638629 is an apocalyptic number.

It is an amenable number.

42638629 is a deficient number, since it is larger than the sum of its proper divisors (4289243).

42638629 is a wasteful number, since it uses less digits than its factorization.

42638629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34427.

The product of its digits is 124416, while the sum is 40.

The square root of 42638629 is about 6529.8261079450. The cubic root of 42638629 is about 349.3556280041.

The spelling of 42638629 in words is "forty-two million, six hundred thirty-eight thousand, six hundred twenty-nine".