73821418 has 8 divisors (see below), whose sum is σ = 120798720. Its totient is φ = 33555180.

The previous prime is 73821409. The next prime is 73821427. The reversal of 73821418 is 81412837.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (73821409) and next prime (73821427).

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1677738 + ... + 1677781.

It is an arithmetic number, because the mean of its divisors is an integer number (15099840).

Almost surely, 2^73821418 is an apocalyptic number.

73821418 is a deficient number, since it is larger than the sum of its proper divisors (46977302).

73821418 is a wasteful number, since it uses less digits than its factorization.

73821418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3355532.

The product of its digits is 10752, while the sum is 34.

The square root of 73821418 is about 8591.9391292071. The cubic root of 73821418 is about 419.4956493246.

The spelling of 73821418 in words is "seventy-three million, eight hundred twenty-one thousand, four hundred eighteen".