140430820 has 12 divisors (see below), whose sum is σ = 294904764. Its totient is φ = 56172320.

The previous prime is 140430809. The next prime is 140430869. The reversal of 140430820 is 28034041.

It can be written as a sum of positive squares in 2 ways, for example, as 23444964 + 116985856 = 4842^2 + 10816^2 .

It is a junction number, because it is equal to n+sod(n) for n = 140430791 and 140430800.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3510751 + ... + 3510790.

It is an arithmetic number, because the mean of its divisors is an integer number (24575397).

Almost surely, 2^140430820 is an apocalyptic number.

140430820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140430820 is an abundant number, since it is smaller than the sum of its proper divisors (154473944).

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

140430820 is a wasteful number, since it uses less digits than its factorization.

140430820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7021550 (or 7021548 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 140430820 is about 11850.3510496525. The cubic root of 140430820 is about 519.7814910335.

Adding to 140430820 its reverse (28034041), we get a palindrome (168464861).

The spelling of 140430820 in words is "one hundred forty million, four hundred thirty thousand, eight hundred twenty".