30040889281 has 4 divisors (see below), whose sum is σ = 32351726932. Its totient is φ = 27730051632.

The previous prime is 30040889273. The next prime is 30040889287. The reversal of 30040889281 is 18298804003.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13524527025 + 16516362256 = 116295^2 + 128516^2 .

It is a cyclic number.

It is not a de Polignac number, because 30040889281 - 2³ = 30040889273 is a prime.

It is a super-2 number, since 2×30040889281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30040889287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1155418806 + ... + 1155418831.

It is an arithmetic number, because the mean of its divisors is an integer number (8087931733).

Almost surely, 2^30040889281 is an apocalyptic number.

It is an amenable number.

30040889281 is a deficient number, since it is larger than the sum of its proper divisors (2310837651).

30040889281 is a wasteful number, since it uses less digits than its factorization.

30040889281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310837650.

The product of its (nonzero) digits is 110592, while the sum is 43.

The spelling of 30040889281 in words is "thirty billion, forty million, eight hundred eighty-nine thousand, two hundred eighty-one".