30817072 has 40 divisors (see below), whose sum is σ = 70151760. Its totient is φ = 12929280.

The previous prime is 30817067. The next prime is 30817091. The reversal of 30817072 is 27071803.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 30817072.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4447 + ... + 9022.

It is an arithmetic number, because the mean of its divisors is an integer number (1753794).

Almost surely, 2^30817072 is an apocalyptic number.

It is an amenable number.

30817072 is an abundant number, since it is smaller than the sum of its proper divisors (39334688).

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

30817072 is a wasteful number, since it uses less digits than its factorization.

30817072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13501 (or 13495 counting only the distinct ones).

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

The square root of 30817072 is about 5551.3126375660. The cubic root of 30817072 is about 313.5189464099.

Adding to 30817072 its reverse (27071803), we get a palindrome (57888875).

It can be divided in two parts, 3081 and 7072, that added together give a triangular number (10153 = T₁₄₂).

The spelling of 30817072 in words is "thirty million, eight hundred seventeen thousand, seventy-two".