139928544 has 144 divisors (see below), whose sum is σ = 469647360. Its totient is φ = 38672640.

The previous prime is 139928519. The next prime is 139928557. The reversal of 139928544 is 445829931.

139928544 is a `hidden beast` number, since 13 + 9 + 92 + 8 + 544 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a self number, because there is not a number n which added to its sum of digits gives 139928544.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61377 + ... + 63615.

It is an arithmetic number, because the mean of its divisors is an integer number (3261440).

Almost surely, 2^139928544 is an apocalyptic number.

139928544 is a gapful number since it is divisible by the number (14) 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 139928544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234823680).

139928544 is an abundant number, since it is smaller than the sum of its proper divisors (329718816).

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

139928544 is a wasteful number, since it uses less digits than its factorization.

139928544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2293 (or 2282 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 139928544 is about 11829.1396136828. The cubic root of 139928544 is about 519.1610535180.

The spelling of 139928544 in words is "one hundred thirty-nine million, nine hundred twenty-eight thousand, five hundred forty-four".