30440921 has 8 divisors (see below), whose sum is σ = 35446464. Its totient is φ = 25599600.

The previous prime is 30440881. The next prime is 30440933. The reversal of 30440921 is 12904403.

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 30440921 - 2⁶ = 30440857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30440021) 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, 40655 + ... + 41396.

It is an arithmetic number, because the mean of its divisors is an integer number (4430808).

Almost surely, 2^30440921 is an apocalyptic number.

It is an amenable number.

30440921 is a deficient number, since it is larger than the sum of its proper divisors (5005543).

30440921 is an equidigital number, since it uses as much as digits as its factorization.

30440921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82111.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 30440921 is about 5517.3291545820. The cubic root of 30440921 is about 312.2381242889.

The spelling of 30440921 in words is "thirty million, four hundred forty thousand, nine hundred twenty-one".