675749840 has 20 divisors (see below), whose sum is σ = 1571118564. Its totient is φ = 270299904.

The previous prime is 675749791. The next prime is 675749849. The reversal of 675749840 is 48947576.

It can be written as a sum of positive squares in 2 ways, for example, as 456591424 + 219158416 = 21368^2 + 14804^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (675749849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4223357 + ... + 4223516.

Almost surely, 2^675749840 is an apocalyptic number.

It is an amenable number.

675749840 is an abundant number, since it is smaller than the sum of its proper divisors (895368724).

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

675749840 is a wasteful number, since it uses less digits than its factorization.

675749840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8446886 (or 8446880 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 50.

The square root of 675749840 is about 25995.1887856195. The cubic root of 675749840 is about 877.5300228092.

The spelling of 675749840 in words is "six hundred seventy-five million, seven hundred forty-nine thousand, eight hundred forty".