30500000 has 84 divisors (see below), whose sum is σ = 76288086. Its totient is φ = 12000000.

The previous prime is 30499993. The next prime is 30500003. The reversal of 30500000 is 503.

It can be written as a sum of positive squares in 7 ways, for example, as 24720784 + 5779216 = 4972^2 + 2404^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is not an unprimeable number, because it can be changed into a prime (30500003) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 499970 + ... + 500030.

Almost surely, 2^30500000 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 30500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38144043).

30500000 is an abundant number, since it is smaller than the sum of its proper divisors (45788086).

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

30500000 is an frugal number, since it uses more digits than its factorization.

30500000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 15, while the sum is 8.

The square root of 30500000 is about 5522.6805085936. The cubic root of 30500000 is about 312.4399884763.

Adding to 30500000 its reverse (503), we get a palindrome (30500503).

The spelling of 30500000 in words is "thirty million, five hundred thousand".