30733830 has 80 divisors (see below), whose sum is σ = 87032880. Its totient is φ = 7760448.

The previous prime is 30733793. The next prime is 30733831. The reversal of 30733830 is 3833703.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 30733794 and 30733803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30733831) 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 39 ways as a sum of consecutive naturals, for example, 14392 + ... + 16388.

It is an arithmetic number, because the mean of its divisors is an integer number (1087911).

Almost surely, 2^30733830 is an apocalyptic number.

30733830 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 30733830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43516440).

30733830 is an abundant number, since it is smaller than the sum of its proper divisors (56299050).

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

30733830 is a wasteful number, since it uses less digits than its factorization.

30733830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2035 (or 2026 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 27.

The square root of 30733830 is about 5543.8100616814. The cubic root of 30733830 is about 313.2364030440.

It can be divided in two parts, 3073 and 3830, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 30733830 in words is "thirty million, seven hundred thirty-three thousand, eight hundred thirty".