139426656 has 96 divisors (see below), whose sum is σ = 398170080. Its totient is φ = 42541056.

The previous prime is 139426649. The next prime is 139426657. The reversal of 139426656 is 656624931.

139426656 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 (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139426657) 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, 59230 + ... + 61538.

It is an arithmetic number, because the mean of its divisors is an integer number (4147605).

Almost surely, 2^139426656 is an apocalyptic number.

139426656 is a gapful number since it is divisible by the number (16) 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 139426656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199085040).

139426656 is an abundant number, since it is smaller than the sum of its proper divisors (258743424).

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

139426656 is a wasteful number, since it uses less digits than its factorization.

139426656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2376 (or 2368 counting only the distinct ones).

The product of its digits is 233280, while the sum is 42.

The square root of 139426656 is about 11807.9065036949. The cubic root of 139426656 is about 518.5396105081.

The spelling of 139426656 in words is "one hundred thirty-nine million, four hundred twenty-six thousand, six hundred fifty-six".