140643720 has 384 divisors, whose sum is σ = 572832000. Its totient is φ = 29804544.

The previous prime is 140643709. The next prime is 140643751. The reversal of 140643720 is 27346041.

140643720 is a `hidden beast` number, since 14 + 0 + 643 + 7 + 2 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2099127 + ... + 2099193.

It is an arithmetic number, because the mean of its divisors is an integer number (1491750).

Almost surely, 2^140643720 is an apocalyptic number.

140643720 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 140643720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286416000).

140643720 is an abundant number, since it is smaller than the sum of its proper divisors (432188280).

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

140643720 is a wasteful number, since it uses less digits than its factorization.

140643720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 140643720 is about 11859.3305038691. The cubic root of 140643720 is about 520.0440298023.

Adding to 140643720 its reverse (27346041), we get a palindrome (167989761).

The spelling of 140643720 in words is "one hundred forty million, six hundred forty-three thousand, seven hundred twenty".