30855388 has 6 divisors (see below), whose sum is σ = 53996936. Its totient is φ = 15427692.

The previous prime is 30855361. The next prime is 30855389. The reversal of 30855388 is 88355803.

It is a self number, because there is not a number n which added to its sum of digits gives 30855388.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30855389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3856920 + ... + 3856927.

Almost surely, 2^30855388 is an apocalyptic number.

It is an amenable number.

30855388 is a deficient number, since it is larger than the sum of its proper divisors (23141548).

30855388 is a wasteful number, since it uses less digits than its factorization.

30855388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7713851 (or 7713849 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 30855388 is about 5554.7626411936. The cubic root of 30855388 is about 313.6488291444.

It can be divided in two parts, 308 and 55388, that added together give a square (55696 = 236²).

The spelling of 30855388 in words is "thirty million, eight hundred fifty-five thousand, three hundred eighty-eight".