30471557440 has 56 divisors (see below), whose sum is σ = 75062501640. Its totient is φ = 11768322048.

The previous prime is 30471557407. The next prime is 30471557447. The reversal of 30471557440 is 4475517403.

It can be written as a sum of positive squares in 4 ways, for example, as 6775265344 + 23696292096 = 82312^2 + 153936^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 30471557393 and 30471557402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30471557447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1632507 + ... + 1651066.

It is an arithmetic number, because the mean of its divisors is an integer number (1340401815).

Almost surely, 2^30471557440 is an apocalyptic number.

It is an amenable number.

30471557440 is an abundant number, since it is smaller than the sum of its proper divisors (44590944200).

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

30471557440 is a wasteful number, since it uses less digits than its factorization.

30471557440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3283619 (or 3283609 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 40.

The spelling of 30471557440 in words is "thirty billion, four hundred seventy-one million, five hundred fifty-seven thousand, four hundred forty".