139161960 has 288 divisors, whose sum is σ = 550592640. Its totient is φ = 30425472.

The previous prime is 139161931. The next prime is 139162003. The reversal of 139161960 is 69161931.

139161960 is a `hidden beast` number, since 1 + 39 + 1 + 619 + 6 + 0 = 666.

It is a super-2 number, since 2×139161960² = 38732102222083200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6050509 + ... + 6050531.

It is an arithmetic number, because the mean of its divisors is an integer number (1911780).

Almost surely, 2^139161960 is an apocalyptic number.

139161960 is a gapful number since it is divisible by the number (10) 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 139161960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275296320).

139161960 is an abundant number, since it is smaller than the sum of its proper divisors (411430680).

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

139161960 is an equidigital number, since it uses as much as digits as its factorization.

139161960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 139161960 is about 11796.6927568705. The cubic root of 139161960 is about 518.2112603098.

It can be divided in two parts, 13916 and 1960, that added together give a square (15876 = 126²).

The spelling of 139161960 in words is "one hundred thirty-nine million, one hundred sixty-one thousand, nine hundred sixty".