42383840 has 24 divisors (see below), whose sum is σ = 100132200. Its totient is φ = 16953472.

The previous prime is 42383821. The next prime is 42383843. The reversal of 42383840 is 4838324.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 42383797 and 42383806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42383843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132290 + ... + 132609.

It is an arithmetic number, because the mean of its divisors is an integer number (4172175).

Almost surely, 2^42383840 is an apocalyptic number.

42383840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42383840 is an abundant number, since it is smaller than the sum of its proper divisors (57748360).

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

42383840 is a wasteful number, since it uses less digits than its factorization.

42383840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264914 (or 264906 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 42383840 is about 6510.2872440469. The cubic root of 42383840 is about 348.6583740316.

The spelling of 42383840 in words is "forty-two million, three hundred eighty-three thousand, eight hundred forty".