139837140 has 72 divisors (see below), whose sum is σ = 428599080. Its totient is φ = 36900864.

The previous prime is 139837099. The next prime is 139837141. The reversal of 139837140 is 41738931.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18352656 + 121484484 = 4284^2 + 11022^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 139837095 and 139837104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139837141) 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, 13456 + ... + 21464.

It is an arithmetic number, because the mean of its divisors is an integer number (5952765).

Almost surely, 2^139837140 is an apocalyptic number.

139837140 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 139837140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214299540).

139837140 is an abundant number, since it is smaller than the sum of its proper divisors (288761940).

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

139837140 is a wasteful number, since it uses less digits than its factorization.

139837140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8121 (or 8116 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 139837140 is about 11825.2754724784. The cubic root of 139837140 is about 519.0479869203.

The spelling of 139837140 in words is "one hundred thirty-nine million, eight hundred thirty-seven thousand, one hundred forty".