30726436 has 36 divisors (see below), whose sum is σ = 60588892. Its totient is φ = 13552704.

The previous prime is 30726431. The next prime is 30726461. The reversal of 30726436 is 63462703.

It can be written as a sum of positive squares in 2 ways, for example, as 2742336 + 27984100 = 1656^2 + 5290^2 .

It is a super-2 number, since 2×30726436² = 1888227738524192, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30726398 and 30726407.

It is not an unprimeable number, because it can be changed into a prime (30726431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26950 + ... + 28066.

Almost surely, 2^30726436 is an apocalyptic number.

It is an amenable number.

30726436 is a deficient number, since it is larger than the sum of its proper divisors (29862456).

30726436 is a wasteful number, since it uses less digits than its factorization.

30726436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180 (or 1155 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 31.

The square root of 30726436 is about 5543.1431516785. The cubic root of 30726436 is about 313.2112813706.

The spelling of 30726436 in words is "thirty million, seven hundred twenty-six thousand, four hundred thirty-six".