30726081 has 16 divisors (see below), whose sum is σ = 45622720. Its totient is φ = 20437920.

The previous prime is 30726067. The next prime is 30726083. The reversal of 30726081 is 18062703.

It is not a de Polignac number, because 30726081 - 2¹⁹ = 30201793 is a prime.

It is a super-2 number, since 2×30726081² = 1888184107237122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30726083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14421 + ... + 16413.

It is an arithmetic number, because the mean of its divisors is an integer number (2851420).

Almost surely, 2^30726081 is an apocalyptic number.

It is an amenable number.

30726081 is a deficient number, since it is larger than the sum of its proper divisors (14896639).

30726081 is a wasteful number, since it uses less digits than its factorization.

30726081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2573 (or 2567 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 30726081 is about 5543.1111300424. Note that the first 4 decimals coincide. The cubic root of 30726081 is about 313.2100751299.

Adding to 30726081 its reverse (18062703), we get a palindrome (48788784).

The spelling of 30726081 in words is "thirty million, seven hundred twenty-six thousand, eighty-one".