30820902 has 48 divisors (see below), whose sum is σ = 72668160. Its totient is φ = 8687952.

The previous prime is 30820901. The next prime is 30820957. The reversal of 30820902 is 20902803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30820901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22563 + ... + 23889.

It is an arithmetic number, because the mean of its divisors is an integer number (1513920).

Almost surely, 2^30820902 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30820902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36334080).

30820902 is an abundant number, since it is smaller than the sum of its proper divisors (41847258).

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

30820902 is a wasteful number, since it uses less digits than its factorization.

30820902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425 (or 1418 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 30820902 is about 5551.6575903058. The cubic root of 30820902 is about 313.5319341009.

The spelling of 30820902 in words is "thirty million, eight hundred twenty thousand, nine hundred two".