42247008 has 84 divisors (see below), whose sum is σ = 124772508. Its totient is φ = 14074560.

The previous prime is 42247001. The next prime is 42247019. The reversal of 42247008 is 80074224.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42247001) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 22423 + ... + 24233.

It is an arithmetic number, because the mean of its divisors is an integer number (1485387).

Almost surely, 2^42247008 is an apocalyptic number.

42247008 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42247008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62386254).

42247008 is an abundant number, since it is smaller than the sum of its proper divisors (82525500).

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

42247008 is an equidigital number, since it uses as much as digits as its factorization.

42247008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1839 (or 1816 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 42247008 is about 6499.7698420790. The cubic root of 42247008 is about 348.2827666092.

The spelling of 42247008 in words is "forty-two million, two hundred forty-seven thousand, eight".