30055000 has 40 divisors (see below), whose sum is σ = 70430580. Its totient is φ = 12020000.

The previous prime is 30054977. The next prime is 30055001. The reversal of 30055000 is 55003.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30055001) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1995 + ... + 8005.

Almost surely, 2^30055000 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 30055000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35215290).

30055000 is an abundant number, since it is smaller than the sum of its proper divisors (40375580).

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

30055000 is an equidigital number, since it uses as much as digits as its factorization.

30055000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6037 (or 6018 counting only the distinct ones).

The product of its (nonzero) digits is 75, while the sum is 13.

The square root of 30055000 is about 5482.2440660737. The cubic root of 30055000 is about 310.9130211026.

The spelling of 30055000 in words is "thirty million, fifty-five thousand".