140288805 has 48 divisors (see below), whose sum is σ = 253309680. Its totient is φ = 71737344.

The previous prime is 140288803. The next prime is 140288861. The reversal of 140288805 is 508882041.

It can be written as a sum of positive squares in 8 ways, for example, as 25070049 + 115218756 = 5007^2 + 10734^2 .

It is not a de Polignac number, because 140288805 - 2¹ = 140288803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140288805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140288803) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 251587 + ... + 252143.

It is an arithmetic number, because the mean of its divisors is an integer number (5277285).

Almost surely, 2^140288805 is an apocalyptic number.

140288805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

140288805 is a deficient number, since it is larger than the sum of its proper divisors (113020875).

140288805 is a wasteful number, since it uses less digits than its factorization.

140288805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790 (or 787 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 140288805 is about 11844.3575174004. The cubic root of 140288805 is about 519.6062169126.

The spelling of 140288805 in words is "one hundred forty million, two hundred eighty-eight thousand, eight hundred five".