42209970 has 64 divisors (see below), whose sum is σ = 113533056. Its totient is φ = 9953280.

The previous prime is 42209897. The next prime is 42209971. The reversal of 42209970 is 7990224.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (42209971) 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, 10482 + ... + 13938.

It is an arithmetic number, because the mean of its divisors is an integer number (1773954).

Almost surely, 2^42209970 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42209970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56766528).

42209970 is an abundant number, since it is smaller than the sum of its proper divisors (71323086).

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

42209970 is a wasteful number, since it uses less digits than its factorization.

42209970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3515.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 42209970 is about 6496.9200395264. The cubic root of 42209970 is about 348.1809568852.

It can be divided in two parts, 42 and 209970, that added together give a palindrome (210012).

The spelling of 42209970 in words is "forty-two million, two hundred nine thousand, nine hundred seventy".