30726842 has 4 divisors (see below), whose sum is σ = 46090266. Its totient is φ = 15363420.

The previous prime is 30726833. The next prime is 30726853. The reversal of 30726842 is 24862703.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24862703 = 181 ⋅137363.

It can be written as a sum of positive squares in only one way, i.e., 27447121 + 3279721 = 5239^2 + 1811^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30726799 and 30726808.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7681709 + ... + 7681712.

Almost surely, 2^30726842 is an apocalyptic number.

30726842 is a deficient number, since it is larger than the sum of its proper divisors (15363424).

30726842 is a wasteful number, since it uses less digits than its factorization.

30726842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15363423.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 30726842 is about 5543.1797733792. The cubic root of 30726842 is about 313.2126608908.

The spelling of 30726842 in words is "thirty million, seven hundred twenty-six thousand, eight hundred forty-two".