30155000 has 80 divisors (see below), whose sum is σ = 73007880. Its totient is φ = 11664000.

The previous prime is 30154981. The next prime is 30155003. The reversal of 30155000 is 55103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30155003) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 184919 + ... + 185081.

Almost surely, 2^30155000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30155000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36503940).

30155000 is an abundant number, since it is smaller than the sum of its proper divisors (42852880).

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

30155000 is a wasteful number, since it uses less digits than its factorization.

30155000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 75, while the sum is 14.

The square root of 30155000 is about 5491.3568450794. The cubic root of 30155000 is about 311.2574660983.

The spelling of 30155000 in words is "thirty million, one hundred fifty-five thousand".