1622866464 has 72 divisors (see below), whose sum is σ = 4670698032. Its totient is φ = 534430080.

The previous prime is 1622866459. The next prime is 1622866481. The reversal of 1622866464 is 4646682261.

1622866464 is a `hidden beast` number, since 162 + 28 + 6 + 6 + 464 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10042 + ... + 57849.

It is an arithmetic number, because the mean of its divisors is an integer number (64870806).

Almost surely, 2^1622866464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1622866464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2335349016).

1622866464 is an abundant number, since it is smaller than the sum of its proper divisors (3047831568).

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

1622866464 is a wasteful number, since it uses less digits than its factorization.

1622866464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67990 (or 67979 counting only the distinct ones).

The product of its digits is 663552, while the sum is 45.

The square root of 1622866464 is about 40284.8167924343. The cubic root of 1622866464 is about 1175.1525895692.

The spelling of 1622866464 in words is "one billion, six hundred twenty-two million, eight hundred sixty-six thousand, four hundred sixty-four".