30726404 has 12 divisors (see below), whose sum is σ = 53868444. Its totient is φ = 15335424.

The previous prime is 30726389. The next prime is 30726407. The reversal of 30726404 is 40462703.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 23425600 + 7300804 = 4840^2 + 2702^2 .

It is a super-2 number, since 2×30726404² = 1888223805542432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30726407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4349 + ... + 8964.

It is an arithmetic number, because the mean of its divisors is an integer number (4489037).

Almost surely, 2^30726404 is an apocalyptic number.

It is an amenable number.

30726404 is a deficient number, since it is larger than the sum of its proper divisors (23142040).

30726404 is a wasteful number, since it uses less digits than its factorization.

30726404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13894 (or 13892 counting only the distinct ones).

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

The square root of 30726404 is about 5543.1402652287. The cubic root of 30726404 is about 313.2111726394.

The spelling of 30726404 in words is "thirty million, seven hundred twenty-six thousand, four hundred four".