140781446 has 32 divisors (see below), whose sum is σ = 233059680. Its totient is φ = 63385344.

The previous prime is 140781391. The next prime is 140781451. The reversal of 140781446 is 644187041.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 191696 + ... + 192428.

It is an arithmetic number, because the mean of its divisors is an integer number (7283115).

Almost surely, 2^140781446 is an apocalyptic number.

140781446 is a deficient number, since it is larger than the sum of its proper divisors (92278234).

140781446 is a wasteful number, since it uses less digits than its factorization.

140781446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 140781446 is about 11865.1357345797. The cubic root of 140781446 is about 520.2137262465.

The spelling of 140781446 in words is "one hundred forty million, seven hundred eighty-one thousand, four hundred forty-six".