140636506 has 8 divisors (see below), whose sum is σ = 211046004. Its totient is φ = 70287840.

The previous prime is 140636477. The next prime is 140636521. The reversal of 140636506 is 605636041.

It can be written as a sum of positive squares in 2 ways, for example, as 140635881 + 625 = 11859^2 + 25^2 .

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

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, 8905 + ... + 18988.

Almost surely, 2^140636506 is an apocalyptic number.

140636506 is a deficient number, since it is larger than the sum of its proper divisors (70409498).

140636506 is a wasteful number, since it uses less digits than its factorization.

140636506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30416.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 140636506 is about 11859.0263512651. The cubic root of 140636506 is about 520.0351381581.

The spelling of 140636506 in words is "one hundred forty million, six hundred thirty-six thousand, five hundred six".