42357440 has 28 divisors (see below), whose sum is σ = 100864416. Its totient is φ = 16942848.

The previous prime is 42357433. The next prime is 42357449. The reversal of 42357440 is 4475324.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (42357449) 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, 65864 + ... + 66503.

Almost surely, 2^42357440 is an apocalyptic number.

42357440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42357440 is an abundant number, since it is smaller than the sum of its proper divisors (58506976).

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

42357440 is a wasteful number, since it uses less digits than its factorization.

42357440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132384 (or 132374 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 29.

The square root of 42357440 is about 6508.2593679109. The cubic root of 42357440 is about 348.5859683471.

The spelling of 42357440 in words is "forty-two million, three hundred fifty-seven thousand, four hundred forty".