3894745261 has 8 divisors (see below), whose sum is σ = 4292616384. Its totient is φ = 3504174720.

The previous prime is 3894745259. The next prime is 3894745279. The reversal of 3894745261 is 1625474983.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 3894745261 - 2¹ = 3894745259 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 (3894745291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1824025 + ... + 1826158.

It is an arithmetic number, because the mean of its divisors is an integer number (536577048).

Almost surely, 2^3894745261 is an apocalyptic number.

It is an amenable number.

3894745261 is a deficient number, since it is larger than the sum of its proper divisors (397871123).

3894745261 is a wasteful number, since it uses less digits than its factorization.

3894745261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3650291.

The product of its digits is 1451520, while the sum is 49.

The square root of 3894745261 is about 62407.8942202026. The cubic root of 3894745261 is about 1573.3536519398.

The spelling of 3894745261 in words is "three billion, eight hundred ninety-four million, seven hundred forty-five thousand, two hundred sixty-one".