8240740749 has 6 divisors (see below), whose sum is σ = 11903292206. Its totient is φ = 5493827160.

The previous prime is 8240740733. The next prime is 8240740763. The reversal of 8240740749 is 9470470428.

It can be written as a sum of positive squares in only one way, i.e., 7707962025 + 532778724 = 87795^2 + 23082^2 .

It is not a de Polignac number, because 8240740749 - 2⁴ = 8240740733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8240740799) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 457818922 + ... + 457818939.

Almost surely, 2^8240740749 is an apocalyptic number.

It is an amenable number.

8240740749 is a deficient number, since it is larger than the sum of its proper divisors (3662551457).

8240740749 is a wasteful number, since it uses less digits than its factorization.

8240740749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915637867 (or 915637864 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 8240740749 is about 90778.5258142034. The cubic root of 8240740749 is about 2019.8637908515.

The spelling of 8240740749 in words is "eight billion, two hundred forty million, seven hundred forty thousand, seven hundred forty-nine".