30872780 has 12 divisors (see below), whose sum is σ = 64832880. Its totient is φ = 12349104.

The previous prime is 30872767. The next prime is 30872783. The reversal of 30872780 is 8727803.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 30872780.

It is not an unprimeable number, because it can be changed into a prime (30872783) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 771800 + ... + 771839.

It is an arithmetic number, because the mean of its divisors is an integer number (5402740).

Almost surely, 2^30872780 is an apocalyptic number.

It is an amenable number.

30872780 is an abundant number, since it is smaller than the sum of its proper divisors (33960100).

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

30872780 is a wasteful number, since it uses less digits than its factorization.

30872780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543648 (or 1543646 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 30872780 is about 5556.3279240880. The cubic root of 30872780 is about 313.7077486847.

The spelling of 30872780 in words is "thirty million, eight hundred seventy-two thousand, seven hundred eighty".