140220812 has 12 divisors (see below), whose sum is σ = 253302336. Its totient is φ = 67848720.

The previous prime is 140220803. The next prime is 140220833. The reversal of 140220812 is 218022041.

It is a happy number.

It is a super-2 number, since 2×140220812² = 39323752235878688, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 565283 + ... + 565530.

It is an arithmetic number, because the mean of its divisors is an integer number (21108528).

Almost surely, 2^140220812 is an apocalyptic number.

It is an amenable number.

140220812 is a deficient number, since it is larger than the sum of its proper divisors (113081524).

140220812 is a wasteful number, since it uses less digits than its factorization.

140220812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130848 (or 1130846 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 140220812 is about 11841.4868998787. The cubic root of 140220812 is about 519.5222584558.

Adding to 140220812 its reverse (218022041), we get a palindrome (358242853).

The spelling of 140220812 in words is "one hundred forty million, two hundred twenty thousand, eight hundred twelve".