30720084 has 24 divisors (see below), whose sum is σ = 71772960. Its totient is φ = 10226784.

The previous prime is 30720083. The next prime is 30720089. The reversal of 30720084 is 48002703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30720083) 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, 13707 + ... + 15789.

It is an arithmetic number, because the mean of its divisors is an integer number (2990540).

Almost surely, 2^30720084 is an apocalyptic number.

It is an amenable number.

30720084 is an abundant number, since it is smaller than the sum of its proper divisors (41052876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30720084 is a wasteful number, since it uses less digits than its factorization.

30720084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3319 (or 3317 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 30720084 is about 5542.5701619375. The cubic root of 30720084 is about 313.1896967523.

Adding to 30720084 its reverse (48002703), we get a palindrome (78722787).

The spelling of 30720084 in words is "thirty million, seven hundred twenty thousand, eighty-four".