30193972 has 12 divisors (see below), whose sum is σ = 55947780. Its totient is φ = 14208896.

The previous prime is 30193949. The next prime is 30193973. The reversal of 30193972 is 27939103.

It can be written as a sum of positive squares in 2 ways, for example, as 21864976 + 8328996 = 4676^2 + 2886^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30193973) 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 3 ways as a sum of consecutive naturals, for example, 221947 + ... + 222082.

It is an arithmetic number, because the mean of its divisors is an integer number (4662315).

Almost surely, 2^30193972 is an apocalyptic number.

It is an amenable number.

30193972 is a deficient number, since it is larger than the sum of its proper divisors (25753808).

30193972 is a wasteful number, since it uses less digits than its factorization.

30193972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444050 (or 444048 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 30193972 is about 5494.9041847879. The cubic root of 30193972 is about 311.3914969834.

The spelling of 30193972 in words is "thirty million, one hundred ninety-three thousand, nine hundred seventy-two".