42630340 has 12 divisors (see below), whose sum is σ = 89523756. Its totient is φ = 17052128.

The previous prime is 42630307. The next prime is 42630347. The reversal of 42630340 is 4303624.

It can be written as a sum of positive squares in 2 ways, for example, as 10458756 + 32171584 = 3234^2 + 5672^2 .

It is not an unprimeable number, because it can be changed into a prime (42630347) 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, 1065739 + ... + 1065778.

It is an arithmetic number, because the mean of its divisors is an integer number (7460313).

Almost surely, 2^42630340 is an apocalyptic number.

It is an amenable number.

42630340 is an abundant number, since it is smaller than the sum of its proper divisors (46893416).

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

42630340 is a wasteful number, since it uses less digits than its factorization.

42630340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131526 (or 2131524 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 42630340 is about 6529.1913741290. The cubic root of 42630340 is about 349.3329881543.

Adding to 42630340 its reverse (4303624), we get a palindrome (46933964).

The spelling of 42630340 in words is "forty-two million, six hundred thirty thousand, three hundred forty".