30216400 has 30 divisors (see below), whose sum is σ = 72595862. Its totient is φ = 12086400.

The previous prime is 30216367. The next prime is 30216419. The reversal of 30216400 is 461203.

It can be written as a sum of positive squares in 3 ways, for example, as 1871424 + 28344976 = 1368^2 + 5324^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37371 + ... + 38170.

Almost surely, 2^30216400 is an apocalyptic number.

It is an amenable number.

30216400 is an abundant number, since it is smaller than the sum of its proper divisors (42379462).

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

30216400 is a wasteful number, since it uses less digits than its factorization.

30216400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75559 (or 75548 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 30216400 is about 5496.9446058697. The cubic root of 30216400 is about 311.4685781527.

Adding to 30216400 its reverse (461203), we get a palindrome (30677603).

The spelling of 30216400 in words is "thirty million, two hundred sixteen thousand, four hundred".