139813856 has 144 divisors (see below), whose sum is σ = 363983760. Its totient is φ = 52399872.

The previous prime is 139813829. The next prime is 139813859. The reversal of 139813856 is 658318931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139813859) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7358615 + ... + 7358633.

It is an arithmetic number, because the mean of its divisors is an integer number (2527665).

Almost surely, 2^139813856 is an apocalyptic number.

139813856 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 139813856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181991880).

139813856 is an abundant number, since it is smaller than the sum of its proper divisors (224169904).

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

139813856 is an equidigital number, since it uses as much as digits as its factorization.

139813856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 41 counting only the distinct ones).

The product of its digits is 155520, while the sum is 44.

The square root of 139813856 is about 11824.2909301150. The cubic root of 139813856 is about 519.0191767769.

The spelling of 139813856 in words is "one hundred thirty-nine million, eight hundred thirteen thousand, eight hundred fifty-six".