42609880 has 64 divisors (see below), whose sum is σ = 99144000. Its totient is φ = 16473600.

The previous prime is 42609863. The next prime is 42609887. The reversal of 42609880 is 8890624.

It is a super-2 number, since 2×42609880² = 3631203747228800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42609887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214021 + ... + 214219.

It is an arithmetic number, because the mean of its divisors is an integer number (1549125).

Almost surely, 2^42609880 is an apocalyptic number.

42609880 is a gapful number since it is divisible by the number (40) 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 42609880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49572000).

42609880 is an abundant number, since it is smaller than the sum of its proper divisors (56534120).

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

42609880 is a wasteful number, since it uses less digits than its factorization.

42609880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364 (or 360 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 42609880 is about 6527.6243764481. The cubic root of 42609880 is about 349.2770929345.

The spelling of 42609880 in words is "forty-two million, six hundred nine thousand, eight hundred eighty".