30190720 has 128 divisors (see below), whose sum is σ = 86365440. Its totient is φ = 9867264.

The previous prime is 30190717. The next prime is 30190729. The reversal of 30190720 is 2709103.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×30190720² = 1822959148236800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30190691 and 30190700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30190729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102894 + ... + 103186.

It is an arithmetic number, because the mean of its divisors is an integer number (674730).

Almost surely, 2^30190720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30190720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43182720).

30190720 is an abundant number, since it is smaller than the sum of its proper divisors (56174720).

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

30190720 is a wasteful number, since it uses less digits than its factorization.

30190720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 330 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 30190720 is about 5494.6082662916. The cubic root of 30190720 is about 311.3803172518.

Adding to 30190720 its reverse (2709103), we get a palindrome (32899823).

The spelling of 30190720 in words is "thirty million, one hundred ninety thousand, seven hundred twenty".