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30490 = 253049
BaseRepresentation
bin111011100011010
31112211021
413130122
51433430
6353054
7154615
oct73432
945737
1030490
11209a9
121578a
1310b55
14b17c
15907a
hex771a

30490 has 8 divisors (see below), whose sum is σ = 54900. Its totient is φ = 12192.

The previous prime is 30469. The next prime is 30491. The reversal of 30490 is 9403.

Adding to 30490 its reverse (9403), we get a palindrome (39893).

It can be written as a sum of positive squares in 2 ways, for example, as 27889 + 2601 = 167^2 + 51^2 .

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

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30491) by changing a digit.

30490 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1515 + ... + 1534.

230490 is an apocalyptic number.

30490 is a deficient number, since it is larger than the sum of its proper divisors (24410).

30490 is a wasteful number, since it uses less digits than its factorization.

30490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3056.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 30490 is about 174.6138597019. The cubic root of 30490 is about 31.2405838297.

The spelling of 30490 in words is "thirty thousand, four hundred ninety".

Divisors: 1 2 5 10 3049 6098 15245 30490