30455772 has 48 divisors (see below), whose sum is σ = 78527232. Its totient is φ = 9137920.

The previous prime is 30455767. The next prime is 30455783. The reversal of 30455772 is 27755403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1447 + ... + 7937.

It is an arithmetic number, because the mean of its divisors is an integer number (1635984).

Almost surely, 2^30455772 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 30455772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39263616).

30455772 is an abundant number, since it is smaller than the sum of its proper divisors (48071460).

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

30455772 is a wasteful number, since it uses less digits than its factorization.

30455772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6538 (or 6536 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 33.

The square root of 30455772 is about 5518.6748409378. The cubic root of 30455772 is about 312.2888925131.

The spelling of 30455772 in words is "thirty million, four hundred fifty-five thousand, seven hundred seventy-two".