3909894481 has 8 divisors (see below), whose sum is σ = 4144449024. Its totient is φ = 3675846720.

The previous prime is 3909894473. The next prime is 3909894493. The reversal of 3909894481 is 1844989093.

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 3909894481 - 2³ = 3909894473 is a prime.

It is a super-2 number, since 2×3909894481² = 30574549705108518722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3909894431) 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, 110745 + ... + 141718.

It is an arithmetic number, because the mean of its divisors is an integer number (518056128).

Almost surely, 2^3909894481 is an apocalyptic number.

It is an amenable number.

3909894481 is a deficient number, since it is larger than the sum of its proper divisors (234554543).

3909894481 is a wasteful number, since it uses less digits than its factorization.

3909894481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253391.

The product of its (nonzero) digits is 2239488, while the sum is 55.

The square root of 3909894481 is about 62529.1490506628. The cubic root of 3909894481 is about 1575.3909476806.

The spelling of 3909894481 in words is "three billion, nine hundred nine million, eight hundred ninety-four thousand, four hundred eighty-one".