139616440 has 64 divisors (see below), whose sum is σ = 339163200. Its totient is φ = 51566592.

The previous prime is 139616437. The next prime is 139616453. The reversal of 139616440 is 44616931.

It is a junction number, because it is equal to n+sod(n) for n = 139616396 and 139616405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24064 + ... + 29296.

It is an arithmetic number, because the mean of its divisors is an integer number (5299425).

Almost surely, 2^139616440 is an apocalyptic number.

139616440 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 139616440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169581600).

139616440 is an abundant number, since it is smaller than the sum of its proper divisors (199546760).

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

139616440 is a wasteful number, since it uses less digits than its factorization.

139616440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5296 (or 5292 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 139616440 is about 11815.9400810938. The cubic root of 139616440 is about 518.7747781265.

The spelling of 139616440 in words is "one hundred thirty-nine million, six hundred sixteen thousand, four hundred forty".