30553872 has 20 divisors (see below), whose sum is σ = 78930960. Its totient is φ = 10184608.

The previous prime is 30553871. The next prime is 30553883. The reversal of 30553872 is 27835503.

It is not an unprimeable number, because it can be changed into a prime (30553871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318222 + ... + 318317.

It is an arithmetic number, because the mean of its divisors is an integer number (3946548).

Almost surely, 2^30553872 is an apocalyptic number.

It is an amenable number.

30553872 is an abundant number, since it is smaller than the sum of its proper divisors (48377088).

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

30553872 is a wasteful number, since it uses less digits than its factorization.

30553872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636550 (or 636544 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 30553872 is about 5527.5556984982. Note that the first 3 decimals coincide. The cubic root of 30553872 is about 312.6238340153.

The spelling of 30553872 in words is "thirty million, five hundred fifty-three thousand, eight hundred seventy-two".