140138856 has 192 divisors, whose sum is σ = 461160000. Its totient is φ = 39087360.

The previous prime is 140138809. The next prime is 140138857. The reversal of 140138856 is 658831041.

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

It is a self number, because there is not a number n which added to its sum of digits gives 140138856.

It is not an unprimeable number, because it can be changed into a prime (140138857) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 401370 + ... + 401718.

It is an arithmetic number, because the mean of its divisors is an integer number (2401875).

Almost surely, 2^140138856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140138856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230580000).

140138856 is an abundant number, since it is smaller than the sum of its proper divisors (321021144).

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

140138856 is a wasteful number, since it uses less digits than its factorization.

140138856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401 (or 378 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 140138856 is about 11838.0258489328. The cubic root of 140138856 is about 519.4210222613.

Adding to 140138856 its reverse (658831041), we get a palindrome (798969897).

The spelling of 140138856 in words is "one hundred forty million, one hundred thirty-eight thousand, eight hundred fifty-six".