42228629 has 4 divisors (see below), whose sum is σ = 44712684. Its totient is φ = 39744576.

The previous prime is 42228587. The next prime is 42228679. The reversal of 42228629 is 92682224.

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

It can be written as a sum of positive squares in 2 ways, for example, as 38626225 + 3602404 = 6215^2 + 1898^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42228629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42228679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1242002 + ... + 1242035.

It is an arithmetic number, because the mean of its divisors is an integer number (11178171).

Almost surely, 2^42228629 is an apocalyptic number.

It is an amenable number.

42228629 is a deficient number, since it is larger than the sum of its proper divisors (2484055).

42228629 is a wasteful number, since it uses less digits than its factorization.

42228629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2484054.

The product of its digits is 27648, while the sum is 35.

The square root of 42228629 is about 6498.3558689872. The cubic root of 42228629 is about 348.2322540189.

The spelling of 42228629 in words is "forty-two million, two hundred twenty-eight thousand, six hundred twenty-nine".