30187072 has 14 divisors (see below), whose sum is σ = 59902598. Its totient is φ = 15093504.

The previous prime is 30187061. The next prime is 30187099. The reversal of 30187072 is 27078103.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 29855296 + 331776 = 5464^2 + 576^2 .

It is a super-2 number, since 2×30187072² = 1822518631866368, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 30187072.

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 as a sum of consecutive naturals, namely, 235773 + ... + 235900.

It is an arithmetic number, because the mean of its divisors is an integer number (4278757).

Almost surely, 2^30187072 is an apocalyptic number.

30187072 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

30187072 is a deficient number, since it is larger than the sum of its proper divisors (29715526).

30187072 is an equidigital number, since it uses as much as digits as its factorization.

30187072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471685 (or 471675 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 30187072 is about 5494.2762944723. The cubic root of 30187072 is about 311.3677751953.

The spelling of 30187072 in words is "thirty million, one hundred eighty-seven thousand, seventy-two".