30533400 has 72 divisors (see below), whose sum is σ = 102547380. Its totient is φ = 8141760.

The previous prime is 30533389. The next prime is 30533401. The reversal of 30533400 is 433503.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30533401) 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 17 ways as a sum of consecutive naturals, for example, 6682 + ... + 10281.

Almost surely, 2^30533400 is an apocalyptic number.

30533400 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30533400 is an abundant number, since it is smaller than the sum of its proper divisors (72013980).

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

30533400 is a wasteful number, since it uses less digits than its factorization.

30533400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16985 (or 16973 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 18.

The square root of 30533400 is about 5525.7035751115. The cubic root of 30533400 is about 312.5539960030.

Adding to 30533400 its reverse (433503), we get a palindrome (30966903).

The spelling of 30533400 in words is "thirty million, five hundred thirty-three thousand, four hundred".