42215628 has 96 divisors (see below), whose sum is σ = 123257344. Its totient is φ = 10948608.

The previous prime is 42215617. The next prime is 42215629. The reversal of 42215628 is 82651224.

It is a junction number, because it is equal to n+sod(n) for n = 42215595 and 42215604.

It is not an unprimeable number, because it can be changed into a prime (42215629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72876 + ... + 73452.

Almost surely, 2^42215628 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42215628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61628672).

42215628 is an abundant number, since it is smaller than the sum of its proper divisors (81041716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42215628 is a wasteful number, since it uses less digits than its factorization.

42215628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671 (or 669 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

The square root of 42215628 is about 6497.3554620322. The cubic root of 42215628 is about 348.1965133982.

The spelling of 42215628 in words is "forty-two million, two hundred fifteen thousand, six hundred twenty-eight".