42183440 has 80 divisors (see below), whose sum is σ = 107993088. Its totient is φ = 15226368.

The previous prime is 42183433. The next prime is 42183451. The reversal of 42183440 is 4438124.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×42183440² = 3558885220467200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48449 + ... + 49311.

Almost surely, 2^42183440 is an apocalyptic number.

42183440 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 42183440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53996544).

42183440 is an abundant number, since it is smaller than the sum of its proper divisors (65809648).

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

42183440 is a wasteful number, since it uses less digits than its factorization.

42183440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936 (or 930 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 42183440 is about 6494.8779819178. The cubic root of 42183440 is about 348.1079948438.

The spelling of 42183440 in words is "forty-two million, one hundred eighty-three thousand, four hundred forty".