30047240 has 16 divisors (see below), whose sum is σ = 67606380. Its totient is φ = 12018880.

The previous prime is 30047233. The next prime is 30047273. The reversal of 30047240 is 4274003.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27730756 + 2316484 = 5266^2 + 1522^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375551 + ... + 375630.

Almost surely, 2^30047240 is an apocalyptic number.

It is an amenable number.

30047240 is an abundant number, since it is smaller than the sum of its proper divisors (37559140).

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

30047240 is a wasteful number, since it uses less digits than its factorization.

30047240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751192 (or 751188 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 30047240 is about 5481.5362810074. The cubic root of 30047240 is about 310.8862602451.

The spelling of 30047240 in words is "thirty million, forty-seven thousand, two hundred forty".