139946220 has 36 divisors (see below), whose sum is σ = 424504080. Its totient is φ = 37318944.

The previous prime is 139946207. The next prime is 139946249. The reversal of 139946220 is 22649931.

139946220 is a `hidden beast` number, since 1 + 399 + 46 + 220 = 666.

139946220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 388560 + ... + 388919.

It is an arithmetic number, because the mean of its divisors is an integer number (11791780).

Almost surely, 2^139946220 is an apocalyptic number.

139946220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139946220 is an abundant number, since it is smaller than the sum of its proper divisors (284557860).

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

139946220 is a wasteful number, since it uses less digits than its factorization.

139946220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777494 (or 777489 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 139946220 is about 11829.8867281137. The cubic root of 139946220 is about 519.1829130189.

The spelling of 139946220 in words is "one hundred thirty-nine million, nine hundred forty-six thousand, two hundred twenty".