140640552 has 192 divisors, whose sum is σ = 438197760. Its totient is φ = 40435200.

The previous prime is 140640551. The next prime is 140640557. The reversal of 140640552 is 255046041.

140640552 is a `hidden beast` number, since 14 + 0 + 640 + 5 + 5 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (140640551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1073527 + ... + 1073657.

It is an arithmetic number, because the mean of its divisors is an integer number (2282280).

Almost surely, 2^140640552 is an apocalyptic number.

140640552 is a gapful number since it is divisible by the number (12) 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 140640552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219098880).

140640552 is an abundant number, since it is smaller than the sum of its proper divisors (297557208).

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

140640552 is a wasteful number, since it uses less digits than its factorization.

140640552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 140640552 is about 11859.1969373984. The cubic root of 140640552 is about 520.0401251088.

Adding to 140640552 its reverse (255046041), we get a palindrome (395686593).

The spelling of 140640552 in words is "one hundred forty million, six hundred forty thousand, five hundred fifty-two".