42440626 has 4 divisors (see below), whose sum is σ = 63660942. Its totient is φ = 21220312.

The previous prime is 42440611. The next prime is 42440627. The reversal of 42440626 is 62604424.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 25010001 + 17430625 = 5001^2 + 4175^2 .

It is a super-3 number, since 3×42440626³ (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 = 42440594 and 42440603.

It is not an unprimeable number, because it can be changed into a prime (42440627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610155 + ... + 10610158.

Almost surely, 2^42440626 is an apocalyptic number.

42440626 is a deficient number, since it is larger than the sum of its proper divisors (21220316).

42440626 is a wasteful number, since it uses less digits than its factorization.

42440626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21220315.

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 42440626 is about 6514.6470357188. The cubic root of 42440626 is about 348.8140157321.

The spelling of 42440626 in words is "forty-two million, four hundred forty thousand, six hundred twenty-six".