139887424 has 112 divisors (see below), whose sum is σ = 317113920. Its totient is φ = 60825600.

The previous prime is 139887421. The next prime is 139887427. The reversal of 139887424 is 424788931.

It is an interprime number because it is at equal distance from previous prime (139887421) and next prime (139887427).

Its product of digits (387072) is a multiple of the sum of its prime factors (216).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139887421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1384974 + ... + 1385074.

Almost surely, 2^139887424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139887424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158556960).

139887424 is an abundant number, since it is smaller than the sum of its proper divisors (177226496).

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

139887424 is a wasteful number, since it uses less digits than its factorization.

139887424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 206 counting only the distinct ones).

The product of its digits is 387072, while the sum is 46.

The square root of 139887424 is about 11827.4014052115. The cubic root of 139887424 is about 519.1101942404.

It can be divided in two parts, 13988 and 7424, that added together give a palindrome (21412).

The spelling of 139887424 in words is "one hundred thirty-nine million, eight hundred eighty-seven thousand, four hundred twenty-four".