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30797613 = 32711192339
BaseRepresentation
bin111010101111…
…0111100101101
32010221200101100
41311132330231
530341010423
63020033313
7522526650
oct165367455
963850340
1030797613
1116425780
12a392839
1364c4052
144139897
152a85343
hex1d5ef2d

30797613 has 48 divisors (see below), whose sum is σ = 58406400. Its totient is φ = 15150240.

The previous prime is 30797603. The next prime is 30797617. The reversal of 30797613 is 31679703.

30797613 is a `hidden beast` number, since 30 + 7 + 9 + 7 + 613 = 666.

It is not a de Polignac number, because 30797613 - 25 = 30797581 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30797617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11998 + ... + 14336.

It is an arithmetic number, because the mean of its divisors is an integer number (1216800).

Almost surely, 230797613 is an apocalyptic number.

30797613 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

30797613 is a deficient number, since it is larger than the sum of its proper divisors (27608787).

30797613 is a wasteful number, since it uses less digits than its factorization.

30797613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2382 (or 2379 counting only the distinct ones).

The product of its (nonzero) digits is 23814, while the sum is 36.

The square root of 30797613 is about 5549.5597122655. The cubic root of 30797613 is about 313.4529434954.

The spelling of 30797613 in words is "thirty million, seven hundred ninety-seven thousand, six hundred thirteen".