139866468 has 48 divisors (see below), whose sum is σ = 375481344. Its totient is φ = 39693600.

The previous prime is 139866443. The next prime is 139866479. The reversal of 139866468 is 864668931.

139866468 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 139866468.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7171 + ... + 18197.

It is an arithmetic number, because the mean of its divisors is an integer number (7822528).

Almost surely, 2^139866468 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139866468, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187740672).

139866468 is an abundant number, since it is smaller than the sum of its proper divisors (235614876).

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

139866468 is a wasteful number, since it uses less digits than its factorization.

139866468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11192 (or 11190 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 51.

The square root of 139866468 is about 11826.5154631447. The cubic root of 139866468 is about 519.0842709749.

The spelling of 139866468 in words is "one hundred thirty-nine million, eight hundred sixty-six thousand, four hundred sixty-eight".