30203172 has 24 divisors (see below), whose sum is σ = 78304800. Its totient is φ = 10067688.

The previous prime is 30203167. The next prime is 30203191. The reversal of 30203172 is 27130203.

It is a super-3 number, since 3×30203172³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 139722 + ... + 139937.

It is an arithmetic number, because the mean of its divisors is an integer number (3262700).

Almost surely, 2^30203172 is an apocalyptic number.

It is an amenable number.

30203172 is an abundant number, since it is smaller than the sum of its proper divisors (48101628).

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

30203172 is a wasteful number, since it uses less digits than its factorization.

30203172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279672 (or 279664 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 30203172 is about 5495.7412602851. The cubic root of 30203172 is about 311.4231204131.

Adding to 30203172 its reverse (27130203), we get a palindrome (57333375).

The spelling of 30203172 in words is "thirty million, two hundred three thousand, one hundred seventy-two".