139305418 has 16 divisors (see below), whose sum is σ = 238964544. Its totient is φ = 59663520.

The previous prime is 139305409. The next prime is 139305421. The reversal of 139305418 is 814503931.

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, 33321 + ... + 37267.

It is an arithmetic number, because the mean of its divisors is an integer number (14935284).

Almost surely, 2^139305418 is an apocalyptic number.

139305418 is a deficient number, since it is larger than the sum of its proper divisors (99659126).

139305418 is a wasteful number, since it uses less digits than its factorization.

139305418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6477.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 139305418 is about 11802.7716236484. The cubic root of 139305418 is about 518.3892687735.

The spelling of 139305418 in words is "one hundred thirty-nine million, three hundred five thousand, four hundred eighteen".