73283443440 has 80 divisors (see below), whose sum is σ = 231465104928. Its totient is φ = 19173526528.

The previous prime is 73283443427. The next prime is 73283443489. The reversal of 73283443440 is 4434438237.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 73283443392 and 73283443401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2867919 + ... + 2893358.

Almost surely, 2^73283443440 is an apocalyptic number.

It is an amenable number.

73283443440 is an abundant number, since it is smaller than the sum of its proper divisors (158181661488).

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

73283443440 is a wasteful number, since it uses less digits than its factorization.

73283443440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5761346 (or 5761340 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 42.

The spelling of 73283443440 in words is "seventy-three billion, two hundred eighty-three million, four hundred forty-three thousand, four hundred forty".