3870798581 has 4 divisors (see below), whose sum is σ = 4168552332. Its totient is φ = 3573044832.

The previous prime is 3870798559. The next prime is 3870798637. The reversal of 3870798581 is 1858970783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1858970783 = 13099 ⋅141917.

It can be written as a sum of positive squares in 2 ways, for example, as 2506604356 + 1364194225 = 50066^2 + 36935^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3870798581 is a prime.

It is a super-2 number, since 2×3870798581² = 29966163309343227122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3870798181) 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, 148876856 + ... + 148876881.

It is an arithmetic number, because the mean of its divisors is an integer number (1042138083).

Almost surely, 2^3870798581 is an apocalyptic number.

It is an amenable number.

3870798581 is a deficient number, since it is larger than the sum of its proper divisors (297753751).

3870798581 is a wasteful number, since it uses less digits than its factorization.

3870798581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297753750.

The product of its (nonzero) digits is 3386880, while the sum is 56.

The square root of 3870798581 is about 62215.7422281532. The cubic root of 3870798581 is about 1570.1224539700.

The spelling of 3870798581 in words is "three billion, eight hundred seventy million, seven hundred ninety-eight thousand, five hundred eighty-one".