30820472 has 8 divisors (see below), whose sum is σ = 57788400. Its totient is φ = 15410232.

The previous prime is 30820463. The next prime is 30820477. The reversal of 30820472 is 27402803.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30820477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1926272 + ... + 1926287.

It is an arithmetic number, because the mean of its divisors is an integer number (7223550).

Almost surely, 2^30820472 is an apocalyptic number.

It is an amenable number.

30820472 is a deficient number, since it is larger than the sum of its proper divisors (26967928).

30820472 is a wasteful number, since it uses less digits than its factorization.

30820472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3852565 (or 3852561 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 30820472 is about 5551.6188629984. The cubic root of 30820472 is about 313.5304760064.

The spelling of 30820472 in words is "thirty million, eight hundred twenty thousand, four hundred seventy-two".