30173990 has 64 divisors (see below), whose sum is σ = 68428800. Its totient is φ = 9306240.

The previous prime is 30173977. The next prime is 30173993. The reversal of 30173990 is 9937103.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30173993) 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 31 ways as a sum of consecutive naturals, for example, 114599 + ... + 114861.

It is an arithmetic number, because the mean of its divisors is an integer number (1069200).

Almost surely, 2^30173990 is an apocalyptic number.

30173990 is an abundant number, since it is smaller than the sum of its proper divisors (38254810).

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

30173990 is a wasteful number, since it uses less digits than its factorization.

30173990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437.

The product of its (nonzero) digits is 5103, while the sum is 32.

The square root of 30173990 is about 5493.0856538015. The cubic root of 30173990 is about 311.3227901347.

It can be divided in two parts, 3017 and 3990, that added together give a palindrome (7007).

The spelling of 30173990 in words is "thirty million, one hundred seventy-three thousand, nine hundred ninety".