139820466 has 16 divisors (see below), whose sum is σ = 284917824. Its totient is φ = 45727344.

The previous prime is 139820453. The next prime is 139820467. The reversal of 139820466 is 664028931.

139820466 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (139820467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219526 + ... + 220161.

It is an arithmetic number, because the mean of its divisors is an integer number (17807364).

Almost surely, 2^139820466 is an apocalyptic number.

139820466 is an abundant number, since it is smaller than the sum of its proper divisors (145097358).

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

139820466 is a wasteful number, since it uses less digits than its factorization.

139820466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439745.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 139820466 is about 11824.5704361723. The cubic root of 139820466 is about 519.0273558964.

The spelling of 139820466 in words is "one hundred thirty-nine million, eight hundred twenty thousand, four hundred sixty-six".