30489021 has 16 divisors (see below), whose sum is σ = 46221120. Its totient is φ = 19852560.

The previous prime is 30488981. The next prime is 30489031. The reversal of 30489021 is 12098403.

It is not a de Polignac number, because 30489021 - 2⁶ = 30488957 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30489031) 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, 11970 + ... + 14291.

It is an arithmetic number, because the mean of its divisors is an integer number (2888820).

Almost surely, 2^30489021 is an apocalyptic number.

It is an amenable number.

30489021 is a deficient number, since it is larger than the sum of its proper divisors (15732099).

30489021 is a wasteful number, since it uses less digits than its factorization.

30489021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26313 (or 26307 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 30489021 is about 5521.6864271706. The cubic root of 30489021 is about 312.4024945931.

The spelling of 30489021 in words is "thirty million, four hundred eighty-nine thousand, twenty-one".