140008420 has 24 divisors (see below), whose sum is σ = 298840248. Its totient is φ = 55084800.

The previous prime is 140008411. The next prime is 140008423. The reversal of 140008420 is 24800041.

It can be written as a sum of positive squares in 4 ways, for example, as 16842816 + 123165604 = 4104^2 + 11098^2 .

It is not an unprimeable number, because it can be changed into a prime (140008423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56161 + ... + 58600.

It is an arithmetic number, because the mean of its divisors is an integer number (12451677).

Almost surely, 2^140008420 is an apocalyptic number.

140008420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140008420 is an abundant number, since it is smaller than the sum of its proper divisors (158831828).

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

140008420 is a wasteful number, since it uses less digits than its factorization.

140008420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114831 (or 114829 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 140008420 is about 11832.5153707908. The cubic root of 140008420 is about 519.2598196908.

Adding to 140008420 its reverse (24800041), we get a palindrome (164808461).

The spelling of 140008420 in words is "one hundred forty million, eight thousand, four hundred twenty".