42454433238 has 64 divisors (see below), whose sum is σ = 97905369600. Its totient is φ = 12021795072.

The previous prime is 42454433201. The next prime is 42454433239. The reversal of 42454433238 is 83233445424.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42454433238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42454433239) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3751713 + ... + 3763011.

It is an arithmetic number, because the mean of its divisors is an integer number (1529771400).

Almost surely, 2^42454433238 is an apocalyptic number.

42454433238 is an abundant number, since it is smaller than the sum of its proper divisors (55450936362).

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

42454433238 is a wasteful number, since it uses less digits than its factorization.

42454433238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12101.

The product of its digits is 1105920, while the sum is 42.

The spelling of 42454433238 in words is "forty-two billion, four hundred fifty-four million, four hundred thirty-three thousand, two hundred thirty-eight".