30725806 has 4 divisors (see below), whose sum is σ = 46088712. Its totient is φ = 15362902.

The previous prime is 30725803. The next prime is 30725837. The reversal of 30725806 is 60852703.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30725801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7681450 + ... + 7681453.

It is an arithmetic number, because the mean of its divisors is an integer number (11522178).

Almost surely, 2^30725806 is an apocalyptic number.

30725806 is a deficient number, since it is larger than the sum of its proper divisors (15362906).

30725806 is a wasteful number, since it uses less digits than its factorization.

30725806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15362905.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 30725806 is about 5543.0863244225. The cubic root of 30725806 is about 313.2091407117.

The spelling of 30725806 in words is "thirty million, seven hundred twenty-five thousand, eight hundred six".