140405000 has 40 divisors (see below), whose sum is σ = 328980630. Its totient is φ = 56160000.

The previous prime is 140404997. The next prime is 140405017. The reversal of 140405000 is 504041.

It can be written as a sum of positive squares in 5 ways, for example, as 77284 + 140327716 = 278^2 + 11846^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 9041 + ... + 19040.

Almost surely, 2^140405000 is an apocalyptic number.

140405000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140405000 is an abundant number, since it is smaller than the sum of its proper divisors (188575630).

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

140405000 is an equidigital number, since it uses as much as digits as its factorization.

140405000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28107 (or 28088 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 140405000 is about 11849.2615803686. The cubic root of 140405000 is about 519.7496329255.

Adding to 140405000 its reverse (504041), we get a palindrome (140909041).

The spelling of 140405000 in words is "one hundred forty million, four hundred five thousand".