30818207 has 8 divisors (see below), whose sum is σ = 35940000. Its totient is φ = 26415312.

The previous prime is 30818197. The next prime is 30818233. The reversal of 30818207 is 70281803.

It is not a de Polignac number, because 30818207 - 2¹² = 30814111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30818207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30818407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44582 + ... + 45267.

It is an arithmetic number, because the mean of its divisors is an integer number (4492500).

Almost surely, 2^30818207 is an apocalyptic number.

30818207 is a deficient number, since it is larger than the sum of its proper divisors (5121793).

30818207 is an frugal number, since it uses more digits than its factorization.

30818207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89870 (or 89856 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 30818207 is about 5551.4148646989. The cubic root of 30818207 is about 313.5227953548.

The spelling of 30818207 in words is "thirty million, eight hundred eighteen thousand, two hundred seven".