139819212 has 36 divisors (see below), whose sum is σ = 380620240. Its totient is φ = 43021152.

The previous prime is 139819201. The next prime is 139819213. The reversal of 139819212 is 212918931.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (139819213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 148912 + ... + 149847.

Almost surely, 2^139819212 is an apocalyptic number.

139819212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

139819212 is an abundant number, since it is smaller than the sum of its proper divisors (240801028).

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

139819212 is a wasteful number, since it uses less digits than its factorization.

139819212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298782 (or 298777 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 139819212 is about 11824.5174108714. The cubic root of 139819212 is about 519.0258042345.

The spelling of 139819212 in words is "one hundred thirty-nine million, eight hundred nineteen thousand, two hundred twelve".