30121388 has 48 divisors (see below), whose sum is σ = 60117120. Its totient is φ = 13084800.

The previous prime is 30121369. The next prime is 30121411. The reversal of 30121388 is 88312103.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106295 + ... + 106577.

It is an arithmetic number, because the mean of its divisors is an integer number (1252440).

Almost surely, 2^30121388 is an apocalyptic number.

It is an amenable number.

30121388 is a deficient number, since it is larger than the sum of its proper divisors (29995732).

30121388 is a wasteful number, since it uses less digits than its factorization.

30121388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 30121388 is about 5488.2955459778. The cubic root of 30121388 is about 311.1417763235.

The spelling of 30121388 in words is "thirty million, one hundred twenty-one thousand, three hundred eighty-eight".