42623240 has 64 divisors (see below), whose sum is σ = 106133760. Its totient is φ = 15275520.

The previous prime is 42623227. The next prime is 42623249. The reversal of 42623240 is 4232624.

It is not an unprimeable number, because it can be changed into a prime (42623249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31457 + ... + 32783.

It is an arithmetic number, because the mean of its divisors is an integer number (1658340).

Almost surely, 2^42623240 is an apocalyptic number.

42623240 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 42623240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53066880).

42623240 is an abundant number, since it is smaller than the sum of its proper divisors (63510520).

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

42623240 is a wasteful number, since it uses less digits than its factorization.

42623240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422 (or 1418 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 42623240 is about 6528.6476394426. The cubic root of 42623240 is about 349.3135935016.

Adding to 42623240 its reverse (4232624), we get a palindrome (46855864).

The spelling of 42623240 in words is "forty-two million, six hundred twenty-three thousand, two hundred forty".