30813534 has 20 divisors (see below), whose sum is σ = 69045504. Its totient is φ = 10271124.

The previous prime is 30813533. The next prime is 30813557. The reversal of 30813534 is 43531803.

It is a happy number.

30813534 is a `hidden beast` number, since 308 + 1 + 353 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 30813498 and 30813507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30813533) 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, 94942 + ... + 95265.

Almost surely, 2^30813534 is an apocalyptic number.

30813534 is an abundant number, since it is smaller than the sum of its proper divisors (38231970).

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

30813534 is a wasteful number, since it uses less digits than its factorization.

30813534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190221 (or 190212 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 30813534 is about 5550.9939650481. The cubic root of 30813534 is about 313.5069479470.

The spelling of 30813534 in words is "thirty million, eight hundred thirteen thousand, five hundred thirty-four".