42630440 has 32 divisors (see below), whose sum is σ = 96392160. Its totient is φ = 16968000.

The previous prime is 42630439. The next prime is 42630449. The reversal of 42630440 is 4403624.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (42630449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5915 + ... + 10965.

It is an arithmetic number, because the mean of its divisors is an integer number (3012255).

Almost surely, 2^42630440 is an apocalyptic number.

42630440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42630440 is an abundant number, since it is smaller than the sum of its proper divisors (53761720).

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

42630440 is a wasteful number, since it uses less digits than its factorization.

42630440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5273 (or 5269 counting only the distinct ones).

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

The square root of 42630440 is about 6529.1990320406. The cubic root of 42630440 is about 349.3332613031. Note that the first 3 decimals are identical.

The spelling of 42630440 in words is "forty-two million, six hundred thirty thousand, four hundred forty".