30748809 has 32 divisors (see below), whose sum is σ = 50842624. Its totient is φ = 16096320.

The previous prime is 30748793. The next prime is 30748831. The reversal of 30748809 is 90884703.

It is not a de Polignac number, because 30748809 - 2⁴ = 30748793 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (30748009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44154 + ... + 44844.

It is an arithmetic number, because the mean of its divisors is an integer number (1588832).

Almost surely, 2^30748809 is an apocalyptic number.

30748809 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

30748809 is a deficient number, since it is larger than the sum of its proper divisors (20093815).

30748809 is a wasteful number, since it uses less digits than its factorization.

30748809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 30748809 is about 5545.1608633114. The cubic root of 30748809 is about 313.2872829814.

The spelling of 30748809 in words is "thirty million, seven hundred forty-eight thousand, eight hundred nine".