139761630 has 48 divisors (see below), whose sum is σ = 365034384. Its totient is φ = 37100160.

The previous prime is 139761599. The next prime is 139761631. The reversal of 139761630 is 36167931.

139761630 is a `hidden beast` number, since 1 + 3 + 9 + 7 + 616 + 30 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139761631) 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, 17010 + ... + 23850.

It is an arithmetic number, because the mean of its divisors is an integer number (7604883).

Almost surely, 2^139761630 is an apocalyptic number.

139761630 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 139761630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182517192).

139761630 is an abundant number, since it is smaller than the sum of its proper divisors (225272754).

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

139761630 is a wasteful number, since it uses less digits than its factorization.

139761630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7081 (or 7078 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 139761630 is about 11822.0823038922. The cubic root of 139761630 is about 518.9545440047.

The spelling of 139761630 in words is "one hundred thirty-nine million, seven hundred sixty-one thousand, six hundred thirty".