30790145 has 8 divisors (see below), whose sum is σ = 39121704. Its totient is φ = 23183104.

The previous prime is 30790093. The next prime is 30790147. The reversal of 30790145 is 54109703.

It can be written as a sum of positive squares in 4 ways, for example, as 8596624 + 22193521 = 2932^2 + 4711^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-30790145 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30790147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181034 + ... + 181203.

It is an arithmetic number, because the mean of its divisors is an integer number (4890213).

Almost surely, 2^30790145 is an apocalyptic number.

It is an amenable number.

30790145 is a deficient number, since it is larger than the sum of its proper divisors (8331559).

30790145 is a wasteful number, since it uses less digits than its factorization.

30790145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362259.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 30790145 is about 5548.8868253011. The cubic root of 30790145 is about 313.4276054297.

Adding to 30790145 its reverse (54109703), we get a palindrome (84899848).

The spelling of 30790145 in words is "thirty million, seven hundred ninety thousand, one hundred forty-five".