4221394464 has 96 divisors (see below), whose sum is σ = 13330759680. Its totient is φ = 1142629632.

The previous prime is 4221394453. The next prime is 4221394469. The reversal of 4221394464 is 4644931224.

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (4221394469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152544 + ... + 178079.

It is an arithmetic number, because the mean of its divisors is an integer number (138862080).

Almost surely, 2^4221394464 is an apocalyptic number.

It is an amenable number.

4221394464 is an abundant number, since it is smaller than the sum of its proper divisors (9109365216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4221394464 is a wasteful number, since it uses less digits than its factorization.

4221394464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330662 (or 330654 counting only the distinct ones).

The product of its digits is 165888, while the sum is 39.

The square root of 4221394464 is about 64972.2591880566. The cubic root of 4221394464 is about 1616.1635662625.

The spelling of 4221394464 in words is "four billion, two hundred twenty-one million, three hundred ninety-four thousand, four hundred sixty-four".