3720278465 has 8 divisors (see below), whose sum is σ = 4469572968. Its totient is φ = 2972730240.

The previous prime is 3720278447. The next prime is 3720278477. The reversal of 3720278465 is 5648720273.

3720278465 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 71031184 + 3649247281 = 8428^2 + 60409^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3720278465 - 2⁸ = 3720278209 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431876 + ... + 440405.

It is an arithmetic number, because the mean of its divisors is an integer number (558696621).

Almost surely, 2^3720278465 is an apocalyptic number.

It is an amenable number.

3720278465 is a deficient number, since it is larger than the sum of its proper divisors (749294503).

3720278465 is an equidigital number, since it uses as much as digits as its factorization.

3720278465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873139.

The product of its (nonzero) digits is 564480, while the sum is 44.

The square root of 3720278465 is about 60994.0854919557. The cubic root of 3720278465 is about 1549.5008403092.

The spelling of 3720278465 in words is "three billion, seven hundred twenty million, two hundred seventy-eight thousand, four hundred sixty-five".