30021400 has 24 divisors (see below), whose sum is σ = 69800220. Its totient is φ = 12008480.

The previous prime is 30021377. The next prime is 30021437. The reversal of 30021400 is 412003.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 74854 + ... + 75253.

Almost surely, 2^30021400 is an apocalyptic number.

It is an amenable number.

30021400 is an abundant number, since it is smaller than the sum of its proper divisors (39778820).

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

30021400 is a wasteful number, since it uses less digits than its factorization.

30021400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150123 (or 150114 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 30021400 is about 5479.1787705823. The cubic root of 30021400 is about 310.7971161186.

Adding to 30021400 its reverse (412003), we get a palindrome (30433403).

The spelling of 30021400 in words is "thirty million, twenty-one thousand, four hundred".