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13207930 = 253733541
BaseRepresentation
bin110010011000…
…100101111010
3220212000212121
4302120211322
511340123210
61151031454
7220160041
oct62304572
926760777
1013207930
11750134a
12450b58a
132975a58
141a7b558
15125d6da
hexc9897a

13207930 has 16 divisors (see below), whose sum is σ = 23844744. Its totient is φ = 5267520.

The previous prime is 13207921. The next prime is 13207949. The reversal of 13207930 is 3970231.

13207930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 10361961 + 2845969 = 3219^2 + 1687^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13207895 and 13207904.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1960 + ... + 5500.

Almost surely, 213207930 is an apocalyptic number.

13207930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13207930 is a deficient number, since it is larger than the sum of its proper divisors (10636814).

13207930 is a wasteful number, since it uses less digits than its factorization.

13207930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3921.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 13207930 is about 3634.2715913921. The cubic root of 13207930 is about 236.3804669296.

It can be divided in two parts, 1320 and 7930, that multiplied together give a triangular number (10467600 = T4575).

The spelling of 13207930 in words is "thirteen million, two hundred seven thousand, nine hundred thirty".

Divisors: 1 2 5 10 373 746 1865 3541 3730 7082 17705 35410 1320793 2641586 6603965 13207930