30449681 has 8 divisors (see below), whose sum is σ = 31900800. Its totient is φ = 29025360.

The previous prime is 30449663. The next prime is 30449701. The reversal of 30449681 is 18694403.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30449681 - 2¹⁰ = 30448657 is a prime.

It is a super-2 number, since 2×30449681² = 1854366146003522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30440681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4355 + ... + 8936.

It is an arithmetic number, because the mean of its divisors is an integer number (3987600).

Almost surely, 2^30449681 is an apocalyptic number.

It is an amenable number.

30449681 is a deficient number, since it is larger than the sum of its proper divisors (1451119).

30449681 is a wasteful number, since it uses less digits than its factorization.

30449681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13399.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 30449681 is about 5518.1229598479. The cubic root of 30449681 is about 312.2680723933.

The spelling of 30449681 in words is "thirty million, four hundred forty-nine thousand, six hundred eighty-one".