30520347880 has 48 divisors (see below), whose sum is σ = 75481120260. Its totient is φ = 11098306560.

The previous prime is 30520347863. The next prime is 30520347899. The reversal of 30520347880 is 8874302503.

It can be written as a sum of positive squares in 2 ways, for example, as 28347109956 + 2173237924 = 168366^2 + 46618^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 3148089 + ... + 3157768.

Almost surely, 2^30520347880 is an apocalyptic number.

It is an amenable number.

30520347880 is an abundant number, since it is smaller than the sum of its proper divisors (44960772380).

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

30520347880 is a wasteful number, since it uses less digits than its factorization.

30520347880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6305890 (or 6305875 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 30520347880 in words is "thirty billion, five hundred twenty million, three hundred forty-seven thousand, eight hundred eighty".