140247818 has 8 divisors (see below), whose sum is σ = 210522240. Its totient is φ = 70073740.

The previous prime is 140247763. The next prime is 140247823. The reversal of 140247818 is 818742041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×140247818² = 39338900907522248, which contains 22 as substring.

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, 21488 + ... + 27243.

It is an arithmetic number, because the mean of its divisors is an integer number (26315280).

Almost surely, 2^140247818 is an apocalyptic number.

140247818 is a deficient number, since it is larger than the sum of its proper divisors (70274422).

140247818 is a wasteful number, since it uses less digits than its factorization.

140247818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50172.

The product of its (nonzero) digits is 14336, while the sum is 35.

The square root of 140247818 is about 11842.6271578565. The cubic root of 140247818 is about 519.5556089913. Note that the first 3 decimals are identical.

Adding to 140247818 its reverse (818742041), we get a palindrome (958989859).

The spelling of 140247818 in words is "one hundred forty million, two hundred forty-seven thousand, eight hundred eighteen".