30471740 has 48 divisors (see below), whose sum is σ = 69346368. Its totient is φ = 11180544.

The previous prime is 30471737. The next prime is 30471751. The reversal of 30471740 is 4717403.

It is a Harshad number since it is a multiple of its sum of digits (26).

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, 60329 + ... + 60831.

It is an arithmetic number, because the mean of its divisors is an integer number (1444716).

Almost surely, 2^30471740 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 30471740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34673184).

30471740 is an abundant number, since it is smaller than the sum of its proper divisors (38874628).

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

30471740 is a wasteful number, since it uses less digits than its factorization.

30471740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758 (or 756 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 30471740 is about 5520.1213754772. The cubic root of 30471740 is about 312.3434607986.

The spelling of 30471740 in words is "thirty million, four hundred seventy-one thousand, seven hundred forty".