140429218 has 4 divisors (see below), whose sum is σ = 210643830. Its totient is φ = 70214608.

The previous prime is 140429213. The next prime is 140429221. The reversal of 140429218 is 812924041.

140429218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 812924041 = 569 ⋅1428689.

It can be written as a sum of positive squares in only one way, i.e., 74770609 + 65658609 = 8647^2 + 8103^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 140429218.

It is not an unprimeable number, because it can be changed into a prime (140429213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35107303 + ... + 35107306.

Almost surely, 2^140429218 is an apocalyptic number.

140429218 is a deficient number, since it is larger than the sum of its proper divisors (70214612).

140429218 is an equidigital number, since it uses as much as digits as its factorization.

140429218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70214611.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 140429218 is about 11850.2834565254. The cubic root of 140429218 is about 519.7795145132.

The spelling of 140429218 in words is "one hundred forty million, four hundred twenty-nine thousand, two hundred eighteen".