4473578640 has 40 divisors (see below), whose sum is σ = 13868094528. Its totient is φ = 1192954240.

The previous prime is 4473578639. The next prime is 4473578651. The reversal of 4473578640 is 468753744.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 4473578640.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9319716 + ... + 9320195.

Almost surely, 2^4473578640 is an apocalyptic number.

4473578640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4473578640 is an abundant number, since it is smaller than the sum of its proper divisors (9394515888).

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

4473578640 is a wasteful number, since it uses less digits than its factorization.

4473578640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18639927 (or 18639921 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 48.

The square root of 4473578640 is about 66884.8162141453. The cubic root of 4473578640 is about 1647.7261166277.

The spelling of 4473578640 in words is "four billion, four hundred seventy-three million, five hundred seventy-eight thousand, six hundred forty".