42669440 has 192 divisors, whose sum is σ = 122094000. Its totient is φ = 14192640.

The previous prime is 42669437. The next prime is 42669443. The reversal of 42669440 is 4496624.

It is an interprime number because it is at equal distance from previous prime (42669437) and next prime (42669443).

It is a super-2 number, since 2×42669440² = 3641362219827200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42669440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42669443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1471346 + ... + 1471374.

Almost surely, 2^42669440 is an apocalyptic number.

42669440 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 42669440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61047000).

42669440 is an abundant number, since it is smaller than the sum of its proper divisors (79424560).

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

42669440 is a wasteful number, since it uses less digits than its factorization.

42669440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 42669440 is about 6532.1849330833. The cubic root of 42669440 is about 349.4397567612.

The spelling of 42669440 in words is "forty-two million, six hundred sixty-nine thousand, four hundred forty".