30155900 has 36 divisors (see below), whose sum is σ = 66969672. Its totient is φ = 11780160.

The previous prime is 30155837. The next prime is 30155929. The reversal of 30155900 is 955103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 794 + ... + 7806.

Almost surely, 2^30155900 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 30155900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33484836).

30155900 is an abundant number, since it is smaller than the sum of its proper divisors (36813772).

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

30155900 is a wasteful number, since it uses less digits than its factorization.

30155900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7070 (or 7063 counting only the distinct ones).

The product of its (nonzero) digits is 675, while the sum is 23.

The square root of 30155900 is about 5491.4387914280. The cubic root of 30155900 is about 311.2605626432.

The spelling of 30155900 in words is "thirty million, one hundred fifty-five thousand, nine hundred".