30743000 has 64 divisors (see below), whose sum is σ = 73120320. Its totient is φ = 12096000.

The previous prime is 30742993. The next prime is 30743051. The reversal of 30743000 is 34703.

It is a self number, because there is not a number n which added to its sum of digits gives 30743000.

It is a congruent number.

It is an unprimeable number.

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, 70784 + ... + 71216.

It is an arithmetic number, because the mean of its divisors is an integer number (1142505).

Almost surely, 2^30743000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30743000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36560160).

30743000 is an abundant number, since it is smaller than the sum of its proper divisors (42377320).

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

30743000 is a wasteful number, since it uses less digits than its factorization.

30743000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525 (or 511 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 17.

The square root of 30743000 is about 5544.6370485362. The cubic root of 30743000 is about 313.2675532151.

Adding to 30743000 its reverse (34703), we get a palindrome (30777703).

The spelling of 30743000 in words is "thirty million, seven hundred forty-three thousand".