140449869 has 56 divisors (see below), whose sum is σ = 254975040. Its totient is φ = 75489408.

The previous prime is 140449853. The next prime is 140449943. The reversal of 140449869 is 968944041.

140449869 is a `hidden beast` number, since 140 + 449 + 8 + 69 = 666.

It is not a de Polignac number, because 140449869 - 2⁴ = 140449853 is a prime.

It is a super-2 number, since 2×140449869² = 39452331404234322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140449819) by changing a digit.

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 55 ways as a sum of consecutive naturals, for example, 85942 + ... + 87560.

Almost surely, 2^140449869 is an apocalyptic number.

It is an amenable number.

140449869 is a deficient number, since it is larger than the sum of its proper divisors (114525171).

140449869 is an equidigital number, since it uses as much as digits as its factorization.

140449869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1661 (or 1646 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 140449869 is about 11851.1547538626. The cubic root of 140449869 is about 519.8049922136.

The spelling of 140449869 in words is "one hundred forty million, four hundred forty-nine thousand, eight hundred sixty-nine".