139918458 has 8 divisors (see below), whose sum is σ = 279836928. Its totient is φ = 46639484.

The previous prime is 139918447. The next prime is 139918459. The reversal of 139918458 is 854819931.

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

139918458 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (139918459) 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, 11659866 + ... + 11659877.

It is an arithmetic number, because the mean of its divisors is an integer number (34979616).

Almost surely, 2^139918458 is an apocalyptic number.

139918458 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

139918458 is a wasteful number, since it uses less digits than its factorization.

139918458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23319748.

The product of its digits is 311040, while the sum is 48.

The square root of 139918458 is about 11828.7132858989. The cubic root of 139918458 is about 519.1485795699.

The spelling of 139918458 in words is "one hundred thirty-nine million, nine hundred eighteen thousand, four hundred fifty-eight".