30537812 has 12 divisors (see below), whose sum is σ = 55284180. Its totient is φ = 14742336.

The previous prime is 30537809. The next prime is 30537817. The reversal of 30537812 is 21873503.

It can be written as a sum of positive squares in 2 ways, for example, as 14167696 + 16370116 = 3764^2 + 4046^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30537817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131513 + ... + 131744.

It is an arithmetic number, because the mean of its divisors is an integer number (4607015).

Almost surely, 2^30537812 is an apocalyptic number.

It is an amenable number.

30537812 is a deficient number, since it is larger than the sum of its proper divisors (24746368).

30537812 is a wasteful number, since it uses less digits than its factorization.

30537812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263290 (or 263288 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 30537812 is about 5526.1027858700. The cubic root of 30537812 is about 312.5690497017.

The spelling of 30537812 in words is "thirty million, five hundred thirty-seven thousand, eight hundred twelve".