139644120 has 384 divisors, whose sum is σ = 567336960. Its totient is φ = 27095040.

The previous prime is 139644061. The next prime is 139644133. The reversal of 139644120 is 21446931.

139644120 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1099497 + ... + 1099623.

It is an arithmetic number, because the mean of its divisors is an integer number (1477440).

Almost surely, 2^139644120 is an apocalyptic number.

139644120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139644120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283668480).

139644120 is an abundant number, since it is smaller than the sum of its proper divisors (427692840).

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

139644120 is a wasteful number, since it uses less digits than its factorization.

139644120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 139644120 is about 11817.1113221464. Note that the first 3 decimals coincide. The cubic root of 139644120 is about 518.8090595167.

The spelling of 139644120 in words is "one hundred thirty-nine million, six hundred forty-four thousand, one hundred twenty".