30121400 has 24 divisors (see below), whose sum is σ = 70032720. Its totient is φ = 12048480.

The previous prime is 30121369. The next prime is 30121411. The reversal of 30121400 is 412103.

It is a happy number.

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, 75104 + ... + 75503.

It is an arithmetic number, because the mean of its divisors is an integer number (2918030).

Almost surely, 2^30121400 is an apocalyptic number.

It is an amenable number.

30121400 is an abundant number, since it is smaller than the sum of its proper divisors (39911320).

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

30121400 is a wasteful number, since it uses less digits than its factorization.

30121400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150623 (or 150614 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 30121400 is about 5488.2966392133. The cubic root of 30121400 is about 311.1418176419.

Adding to 30121400 its reverse (412103), we get a palindrome (30533503).

The spelling of 30121400 in words is "thirty million, one hundred twenty-one thousand, four hundred".