3998064457 has 4 divisors (see below), whose sum is σ = 4054375296. Its totient is φ = 3941753620.

The previous prime is 3998064431. The next prime is 3998064461. The reversal of 3998064457 is 7544608993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3998064457 - 2¹⁵ = 3998031689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3998064398 and 3998064407.

It is not an unprimeable number, because it can be changed into a prime (3998064407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28155313 + ... + 28155454.

It is an arithmetic number, because the mean of its divisors is an integer number (1013593824).

Almost surely, 2^3998064457 is an apocalyptic number.

It is an amenable number.

3998064457 is a deficient number, since it is larger than the sum of its proper divisors (56310839).

3998064457 is an equidigital number, since it uses as much as digits as its factorization.

3998064457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56310838.

The product of its (nonzero) digits is 6531840, while the sum is 55.

The square root of 3998064457 is about 63230.2495408645. The cubic root of 3998064457 is about 1587.1449704095.

The spelling of 3998064457 in words is "three billion, nine hundred ninety-eight million, sixty-four thousand, four hundred fifty-seven".