4644457408 has 28 divisors (see below), whose sum is σ = 9302492952. Its totient is φ = 2300522240.

The previous prime is 4644457399. The next prime is 4644457423. The reversal of 4644457408 is 8047544464.

It is a super-2 number, since 2×4644457408² = 43141969229452156928, which contains 22 as substring.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332263 + ... + 345958.

Almost surely, 2^4644457408 is an apocalyptic number.

It is an amenable number.

4644457408 is an abundant number, since it is smaller than the sum of its proper divisors (4658035544).

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

4644457408 is a wasteful number, since it uses less digits than its factorization.

4644457408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678340 (or 678330 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 46.

The square root of 4644457408 is about 68150.2561110375. The cubic root of 4644457408 is about 1668.4441038275. Note that the first 3 decimals are identical.

The spelling of 4644457408 in words is "four billion, six hundred forty-four million, four hundred fifty-seven thousand, four hundred eight".