3894401745 has 48 divisors (see below), whose sum is σ = 7585643520. Its totient is φ = 1833879168.

The previous prime is 3894401741. The next prime is 3894401801. The reversal of 3894401745 is 5471044983.

3894401745 is a `hidden beast` number, since 38 + 9 + 440 + 174 + 5 = 666.

It is not a de Polignac number, because 3894401745 - 2² = 3894401741 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 3894401745.

It is not an unprimeable number, because it can be changed into a prime (3894401741) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 131265 + ... + 158174.

It is an arithmetic number, because the mean of its divisors is an integer number (158034240).

Almost surely, 2^3894401745 is an apocalyptic number.

It is an amenable number.

3894401745 is a deficient number, since it is larger than the sum of its proper divisors (3691241775).

3894401745 is a wasteful number, since it uses less digits than its factorization.

3894401745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289486 (or 289483 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The square root of 3894401745 is about 62405.1419756417. The cubic root of 3894401745 is about 1573.3073940541.

The spelling of 3894401745 in words is "three billion, eight hundred ninety-four million, four hundred one thousand, seven hundred forty-five".