42440634 has 12 divisors (see below), whose sum is σ = 91954746. Its totient is φ = 14146872.

The previous prime is 42440633. The next prime is 42440641. The reversal of 42440634 is 43604424.

42440634 is a `hidden beast` number, since 4 + 24 + 4 + 0 + 634 = 666.

It can be written as a sum of positive squares in only one way, i.e., 28355625 + 14085009 = 5325^2 + 3753^2 .

It is a super-3 number, since 3×42440634³ (a number of 24 digits) contains 333 as substring.

It is a nialpdrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 42440598 and 42440607.

It is not an unprimeable number, because it can be changed into a prime (42440633) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1178889 + ... + 1178924.

Almost surely, 2^42440634 is an apocalyptic number.

42440634 is an abundant number, since it is smaller than the sum of its proper divisors (49514112).

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

42440634 is a wasteful number, since it uses less digits than its factorization.

42440634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2357821 (or 2357818 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 42440634 is about 6514.6476497198. The cubic root of 42440634 is about 348.8140376491.

The spelling of 42440634 in words is "forty-two million, four hundred forty thousand, six hundred thirty-four".