30788898 has 32 divisors (see below), whose sum is σ = 70578816. Its totient is φ = 8771328.

The previous prime is 30788897. The next prime is 30788939. The reversal of 30788898 is 89888703.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30788898.

It is not an unprimeable number, because it can be changed into a prime (30788893) 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 15 ways as a sum of consecutive naturals, for example, 17340 + ... + 19032.

It is an arithmetic number, because the mean of its divisors is an integer number (2205588).

Almost surely, 2^30788898 is an apocalyptic number.

30788898 is an abundant number, since it is smaller than the sum of its proper divisors (39789918).

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

30788898 is a wasteful number, since it uses less digits than its factorization.

30788898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2138.

The product of its (nonzero) digits is 774144, while the sum is 51.

The square root of 30788898 is about 5548.7744592838. The cubic root of 30788898 is about 313.4233741029.

The spelling of 30788898 in words is "thirty million, seven hundred eighty-eight thousand, eight hundred ninety-eight".