30621948 has 48 divisors (see below), whose sum is σ = 82892544. Its totient is φ = 8616960.

The previous prime is 30621931. The next prime is 30621961. The reversal of 30621948 is 84912603.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 2908 + ... + 8348.

It is an arithmetic number, because the mean of its divisors is an integer number (1726928).

Almost surely, 2^30621948 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 30621948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41446272).

30621948 is an abundant number, since it is smaller than the sum of its proper divisors (52270596).

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

30621948 is a wasteful number, since it uses less digits than its factorization.

30621948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5522 (or 5520 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 30621948 is about 5533.7101478122. The cubic root of 30621948 is about 312.8558438201.

The spelling of 30621948 in words is "thirty million, six hundred twenty-one thousand, nine hundred forty-eight".