140420864 has 18 divisors (see below), whose sum is σ = 280293720. Its totient is φ = 70210304.

The previous prime is 140420851. The next prime is 140420869. The reversal of 140420864 is 468024041.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140420869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274004 + ... + 274515.

Almost surely, 2^140420864 is an apocalyptic number.

It is an amenable number.

140420864 is a deficient number, since it is larger than the sum of its proper divisors (139872856).

140420864 is an frugal number, since it uses more digits than its factorization.

140420864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548535 (or 548521 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 140420864 is about 11849.9309702631. The cubic root of 140420864 is about 519.7692072466.

The spelling of 140420864 in words is "one hundred forty million, four hundred twenty thousand, eight hundred sixty-four".