30400072 has 16 divisors (see below), whose sum is σ = 57112560. Its totient is φ = 15170064.

The previous prime is 30400049. The next prime is 30400081. The reversal of 30400072 is 27000403.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 903 + ... + 7849.

It is an arithmetic number, because the mean of its divisors is an integer number (3569535).

Almost surely, 2^30400072 is an apocalyptic number.

It is an amenable number.

30400072 is a deficient number, since it is larger than the sum of its proper divisors (26712488).

30400072 is a wasteful number, since it uses less digits than its factorization.

30400072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7500 (or 7496 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 30400072 is about 5513.6260301185. The cubic root of 30400072 is about 312.0983965347.

Adding to 30400072 its reverse (27000403), we get a palindrome (57400475).

The spelling of 30400072 in words is "thirty million, four hundred thousand, seventy-two".