30724406 has 32 divisors (see below), whose sum is σ = 51840000. Its totient is φ = 13571712.

The previous prime is 30724399. The next prime is 30724409. The reversal of 30724406 is 60442703.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30724409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128435 + ... + 128673.

It is an arithmetic number, because the mean of its divisors is an integer number (1620000).

Almost surely, 2^30724406 is an apocalyptic number.

30724406 is a deficient number, since it is larger than the sum of its proper divisors (21115594).

30724406 is a wasteful number, since it uses less digits than its factorization.

30724406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 30724406 is about 5542.9600395457. The cubic root of 30724406 is about 313.2043835871.

The spelling of 30724406 in words is "thirty million, seven hundred twenty-four thousand, four hundred six".