730078578 has 12 divisors (see below), whose sum is σ = 1581836958. Its totient is φ = 243359520.

The previous prime is 730078577. The next prime is 730078669. The reversal of 730078578 is 875870037.

730078578 is a `hidden beast` number, since 7 + 3 + 0 + 0 + 78 + 578 = 666.

It can be written as a sum of positive squares in only one way, i.e., 665485209 + 64593369 = 25797^2 + 8037^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (730078577) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20279943 + ... + 20279978.

Almost surely, 2^730078578 is an apocalyptic number.

730078578 is an abundant number, since it is smaller than the sum of its proper divisors (851758380).

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

730078578 is a wasteful number, since it uses less digits than its factorization.

730078578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40559929 (or 40559926 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 45.

The square root of 730078578 is about 27019.9662842129. The cubic root of 730078578 is about 900.4436405379.

The spelling of 730078578 in words is "seven hundred thirty million, seventy-eight thousand, five hundred seventy-eight".