30711772 has 48 divisors (see below), whose sum is σ = 66734080. Its totient is φ = 12042432.

The previous prime is 30711749. The next prime is 30711781. The reversal of 30711772 is 27711703.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 30711772.

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, 50293 + ... + 50899.

Almost surely, 2^30711772 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 30711772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33367040).

30711772 is an abundant number, since it is smaller than the sum of its proper divisors (36022308).

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

30711772 is a wasteful number, since it uses less digits than its factorization.

30711772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770 (or 768 counting only the distinct ones).

The product of its (nonzero) digits is 2058, while the sum is 28.

The square root of 30711772 is about 5541.8202785727. The cubic root of 30711772 is about 313.1614473984.

The spelling of 30711772 in words is "thirty million, seven hundred eleven thousand, seven hundred seventy-two".