139478336 has 42 divisors (see below), whose sum is σ = 294055038. Its totient is φ = 65628160.

The previous prime is 139478303. The next prime is 139478341. The reversal of 139478336 is 633874931.

It can be written as a sum of positive squares in 3 ways, for example, as 28302400 + 111175936 = 5320^2 + 10544^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14726 + ... + 22266.

Almost surely, 2^139478336 is an apocalyptic number.

139478336 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 139478336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147027519).

139478336 is an abundant number, since it is smaller than the sum of its proper divisors (154576702).

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

139478336 is an equidigital number, since it uses as much as digits as its factorization.

139478336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7587 (or 7560 counting only the distinct ones).

The product of its digits is 326592, while the sum is 44.

The square root of 139478336 is about 11810.0946651583. The cubic root of 139478336 is about 518.6036700347.

The spelling of 139478336 in words is "one hundred thirty-nine million, four hundred seventy-eight thousand, three hundred thirty-six".