140028146 has 4 divisors (see below), whose sum is σ = 210042222. Its totient is φ = 70014072.

The previous prime is 140028121. The next prime is 140028149. The reversal of 140028146 is 641820041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 101103025 + 38925121 = 10055^2 + 6239^2 .

It is not an unprimeable number, because it can be changed into a prime (140028149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35007035 + ... + 35007038.

Almost surely, 2^140028146 is an apocalyptic number.

140028146 is a deficient number, since it is larger than the sum of its proper divisors (70014076).

140028146 is an equidigital number, since it uses as much as digits as its factorization.

140028146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70014075.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 140028146 is about 11833.3488920086. The cubic root of 140028146 is about 519.2842049818.

Adding to 140028146 its reverse (641820041), we get a palindrome (781848187).

The spelling of 140028146 in words is "one hundred forty million, twenty-eight thousand, one hundred forty-six".