140445864 has 96 divisors (see below), whose sum is σ = 412393800. Its totient is φ = 42923520.

The previous prime is 140445863. The next prime is 140445931. The reversal of 140445864 is 468544041.

It is a happy number.

140445864 is a `hidden beast` number, since 140 + 4 + 458 + 64 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 55621764 + 84824100 = 7458^2 + 9210^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (140445863) 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 in 23 ways as a sum of consecutive naturals, for example, 169002 + ... + 169830.

Almost surely, 2^140445864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140445864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206196900).

140445864 is an abundant number, since it is smaller than the sum of its proper divisors (271947936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

140445864 is a wasteful number, since it uses less digits than its factorization.

140445864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035 (or 1028 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 36.

The square root of 140445864 is about 11850.9857817820. The cubic root of 140445864 is about 519.8000513314.

The spelling of 140445864 in words is "one hundred forty million, four hundred forty-five thousand, eight hundred sixty-four".