139600008 has 24 divisors (see below), whose sum is σ = 378083550. Its totient is φ = 46533312.

The previous prime is 139599931. The next prime is 139600009. The reversal of 139600008 is 800006931.

It can be written as a sum of positive squares in only one way, i.e., 73307844 + 66292164 = 8562^2 + 8142^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (139600009) by changing a digit.

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, 969373 + ... + 969516.

Almost surely, 2^139600008 is an apocalyptic number.

139600008 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

139600008 is an abundant number, since it is smaller than the sum of its proper divisors (238483542).

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

139600008 is a wasteful number, since it uses less digits than its factorization.

139600008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1938901 (or 1938894 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 139600008 is about 11815.2447287392. The cubic root of 139600008 is about 518.7544251231.

Adding to 139600008 its reverse (800006931), we get a palindrome (939606939).

The spelling of 139600008 in words is "one hundred thirty-nine million, six hundred thousand, eight".