139506930 has 96 divisors (see below), whose sum is σ = 404352000. Its totient is φ = 33163776.

The previous prime is 139506919. The next prime is 139506943. The reversal of 139506930 is 39605931.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26671 + ... + 31469.

It is an arithmetic number, because the mean of its divisors is an integer number (4212000).

Almost surely, 2^139506930 is an apocalyptic number.

139506930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 139506930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202176000).

139506930 is an abundant number, since it is smaller than the sum of its proper divisors (264845070).

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

139506930 is a wasteful number, since it uses less digits than its factorization.

139506930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4848 (or 4845 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 36.

The square root of 139506930 is about 11811.3051776677. The cubic root of 139506930 is about 518.6391066971.

Subtracting from 139506930 its reverse (39605931), we obtain a palindrome (99900999).

The spelling of 139506930 in words is "one hundred thirty-nine million, five hundred six thousand, nine hundred thirty".