30813000 has 64 divisors (see below), whose sum is σ = 96145920. Its totient is φ = 8216000.

The previous prime is 30812989. The next prime is 30813001. The reversal of 30813000 is 31803.

It is a super-3 number, since 3×30813000³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30813001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2136 + ... + 8135.

It is an arithmetic number, because the mean of its divisors is an integer number (1502280).

Almost surely, 2^30813000 is an apocalyptic number.

30813000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30813000 is an abundant number, since it is smaller than the sum of its proper divisors (65332920).

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

30813000 is a wasteful number, since it uses less digits than its factorization.

30813000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10295 (or 10281 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 30813000 is about 5550.9458653458. The cubic root of 30813000 is about 313.5051369065.

Adding to 30813000 its reverse (31803), we get a palindrome (30844803).

The spelling of 30813000 in words is "thirty million, eight hundred thirteen thousand".