30621448 has 96 divisors (see below), whose sum is σ = 71150400. Its totient is φ = 12230400.

The previous prime is 30621401. The next prime is 30621457. The reversal of 30621448 is 84412603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 431253 + ... + 431323.

It is an arithmetic number, because the mean of its divisors is an integer number (741150).

Almost surely, 2^30621448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30621448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35575200).

30621448 is an abundant number, since it is smaller than the sum of its proper divisors (40528952).

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

30621448 is a wasteful number, since it uses less digits than its factorization.

30621448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 30621448 is about 5533.6649699815. The cubic root of 30621448 is about 312.8541410243.

The spelling of 30621448 in words is "thirty million, six hundred twenty-one thousand, four hundred forty-eight".