73870018 has 16 divisors (see below), whose sum is σ = 115706880. Its totient is φ = 35325136.

The previous prime is 73870009. The next prime is 73870031. The reversal of 73870018 is 81007837.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255 + ... + 12157.

It is an arithmetic number, because the mean of its divisors is an integer number (7231680).

Almost surely, 2^73870018 is an apocalyptic number.

73870018 is a deficient number, since it is larger than the sum of its proper divisors (41836862).

73870018 is a wasteful number, since it uses less digits than its factorization.

73870018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12041.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 73870018 is about 8594.7668961991. The cubic root of 73870018 is about 419.5876868242.

It can be divided in two parts, 738 and 70018, that added together give a square (70756 = 266²).

The spelling of 73870018 in words is "seventy-three million, eight hundred seventy thousand, eighteen".