30471040 has 64 divisors (see below), whose sum is σ = 74468160. Its totient is φ = 11917312.

The previous prime is 30471029. The next prime is 30471053. The reversal of 30471040 is 4017403.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 30470999 and 30471017.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29574 + ... + 30586.

It is an arithmetic number, because the mean of its divisors is an integer number (1163565).

Almost surely, 2^30471040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30471040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37234080).

30471040 is an abundant number, since it is smaller than the sum of its proper divisors (43997120).

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

30471040 is a wasteful number, since it uses less digits than its factorization.

30471040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079 (or 1067 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 30471040 is about 5520.0579707101. The cubic root of 30471040 is about 312.3410690514.

Adding to 30471040 its reverse (4017403), we get a palindrome (34488443).

The spelling of 30471040 in words is "thirty million, four hundred seventy-one thousand, forty".