139688496 has 80 divisors (see below), whose sum is σ = 408589920. Its totient is φ = 45676800.

The previous prime is 139688491. The next prime is 139688509. The reversal of 139688496 is 694886931.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (139688491) 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, 19846 + ... + 25946.

It is an arithmetic number, because the mean of its divisors is an integer number (5107374).

Almost surely, 2^139688496 is an apocalyptic number.

139688496 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 139688496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204294960).

139688496 is an abundant number, since it is smaller than the sum of its proper divisors (268901424).

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

139688496 is a wasteful number, since it uses less digits than its factorization.

139688496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6171 (or 6159 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 139688496 is about 11818.9887892324. The cubic root of 139688496 is about 518.8640092765.

The spelling of 139688496 in words is "one hundred thirty-nine million, six hundred eighty-eight thousand, four hundred ninety-six".