42280018 has 8 divisors (see below), whose sum is σ = 69185520. Its totient is φ = 19218180.

The previous prime is 42280013. The next prime is 42280031. The reversal of 42280018 is 81008224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 42279974 and 42280001.

It is not an unprimeable number, because it can be changed into a prime (42280013) 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, 960888 + ... + 960931.

It is an arithmetic number, because the mean of its divisors is an integer number (8648190).

Almost surely, 2^42280018 is an apocalyptic number.

42280018 is a deficient number, since it is larger than the sum of its proper divisors (26905502).

42280018 is a wasteful number, since it uses less digits than its factorization.

42280018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921832.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 42280018 is about 6502.3086669275. The cubic root of 42280018 is about 348.3734540653.

The spelling of 42280018 in words is "forty-two million, two hundred eighty thousand, eighteen".